Home / 81,658,049.40-122,487,074.10-21,073,775.40

Finding the Fourth Proportional to 81,658,049.40, 122,487,074.10 and 21,073,775.40

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Solution

The fourth proportional to 81,658,049.40, 122,487,074.10 and 21,073,775.40 is: 31,610,663.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,658,049.40 : 122,487,074.10 = 21,073,775.40 : x
  2. Step 2: Convert to fraction form
    81,658,049.40/122,487,074.10 = 21,073,775.40/x
  3. Step 3: Cross multiply
    81,658,049.40x = 122,487,074.10 × 21,073,775.40
  4. Step 4: Simplify right side
    81,658,049.40x = 2,581,265,088,986,557
  5. Step 5: Solve for x
    x = 2,581,265,088,986,557/81,658,049.40
  6. Step 6: Final answer
    x = 31,610,663.10

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.