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Finding the Fourth Proportional to 85,654.97, 128,397.69 and 40,597.13

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Solution

The fourth proportional to 85,654.97, 128,397.69 and 40,597.13 is: 60,855.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,654.97 : 128,397.69 = 40,597.13 : x
  2. Step 2: Convert to fraction form
    85,654.97/128,397.69 = 40,597.13/x
  3. Step 3: Cross multiply
    85,654.97x = 128,397.69 × 40,597.13
  4. Step 4: Simplify right side
    85,654.97x = 5,212,577,070.64
  5. Step 5: Solve for x
    x = 5,212,577,070.64/85,654.97
  6. Step 6: Final answer
    x = 60,855.52

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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.