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Finding the Fourth Proportional to 257,985.59, 387,009.15 and 124,770.12

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Solution

The fourth proportional to 257,985.59, 387,009.15 and 124,770.12 is: 187,170.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,985.59 : 387,009.15 = 124,770.12 : x
  2. Step 2: Convert to fraction form
    257,985.59/387,009.15 = 124,770.12/x
  3. Step 3: Cross multiply
    257,985.59x = 387,009.15 × 124,770.12
  4. Step 4: Simplify right side
    257,985.59x = 48,287,176,167.43
  5. Step 5: Solve for x
    x = 48,287,176,167.43/257,985.59
  6. Step 6: Final answer
    x = 187,170.06

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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.