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Finding the Fourth Proportional to 287,663.39, 431,425.87 and 87,985.52

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Solution

The fourth proportional to 287,663.39, 431,425.87 and 87,985.52 is: 131,957.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,663.39 : 431,425.87 = 87,985.52 : x
  2. Step 2: Convert to fraction form
    287,663.39/431,425.87 = 87,985.52/x
  3. Step 3: Cross multiply
    287,663.39x = 431,425.87 × 87,985.52
  4. Step 4: Simplify right side
    287,663.39x = 37,959,229,513.40
  5. Step 5: Solve for x
    x = 37,959,229,513.40/287,663.39
  6. Step 6: Final answer
    x = 131,957.11

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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.