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Finding the Fourth Proportional to 287,688.68, 431,463.72 and 88,010.78

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Solution

The fourth proportional to 287,688.68, 431,463.72 and 88,010.78 is: 131,994.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,688.68 : 431,463.72 = 88,010.78 : x
  2. Step 2: Convert to fraction form
    287,688.68/431,463.72 = 88,010.78/x
  3. Step 3: Cross multiply
    287,688.68x = 431,463.72 × 88,010.78
  4. Step 4: Simplify right side
    287,688.68x = 37,973,458,538.90
  5. Step 5: Solve for x
    x = 37,973,458,538.90/287,688.68
  6. Step 6: Final answer
    x = 131,994.97

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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.