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Finding the Fourth Proportional to 487,987.12, 731,897.65 and 132,918.12

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Solution

The fourth proportional to 487,987.12, 731,897.65 and 132,918.12 is: 199,354.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,987.12 : 731,897.65 = 132,918.12 : x
  2. Step 2: Convert to fraction form
    487,987.12/731,897.65 = 132,918.12/x
  3. Step 3: Cross multiply
    487,987.12x = 731,897.65 × 132,918.12
  4. Step 4: Simplify right side
    487,987.12x = 97,282,459,670.42
  5. Step 5: Solve for x
    x = 97,282,459,670.42/487,987.12
  6. Step 6: Final answer
    x = 199,354.56

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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.