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Finding the Fourth Proportional to 81,065.34, 121,610.16 and 28,465.56

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Solution

The fourth proportional to 81,065.34, 121,610.16 and 28,465.56 is: 42,702.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,065.34 : 121,610.16 = 28,465.56 : x
  2. Step 2: Convert to fraction form
    81,065.34/121,610.16 = 28,465.56/x
  3. Step 3: Cross multiply
    81,065.34x = 121,610.16 × 28,465.56
  4. Step 4: Simplify right side
    81,065.34x = 3,461,701,306.09
  5. Step 5: Solve for x
    x = 3,461,701,306.09/81,065.34
  6. Step 6: Final answer
    x = 42,702.61

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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.