Home / 81,966.40-122,988.60-29,381.20

Finding the Fourth Proportional to 81,966.40, 122,988.60 and 29,381.20

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Solution

The fourth proportional to 81,966.40, 122,988.60 and 29,381.20 is: 44,085.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,966.40 : 122,988.60 = 29,381.20 : x
  2. Step 2: Convert to fraction form
    81,966.40/122,988.60 = 29,381.20/x
  3. Step 3: Cross multiply
    81,966.40x = 122,988.60 × 29,381.20
  4. Step 4: Simplify right side
    81,966.40x = 3,613,552,654.32
  5. Step 5: Solve for x
    x = 3,613,552,654.32/81,966.40
  6. Step 6: Final answer
    x = 44,085.78

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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.