Home / 81,446.12-122,064.78-70,872.20

Finding the Fourth Proportional to 81,446.12, 122,064.78 and 70,872.20

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Solution

The fourth proportional to 81,446.12, 122,064.78 and 70,872.20 is: 106,217.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,446.12 : 122,064.78 = 70,872.20 : x
  2. Step 2: Convert to fraction form
    81,446.12/122,064.78 = 70,872.20/x
  3. Step 3: Cross multiply
    81,446.12x = 122,064.78 × 70,872.20
  4. Step 4: Simplify right side
    81,446.12x = 8,650,999,501.12
  5. Step 5: Solve for x
    x = 8,650,999,501.12/81,446.12
  6. Step 6: Final answer
    x = 106,217.45

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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.