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Finding the Fourth Proportional to 287,871.12, 431,819.64 and 88,176.96

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Solution

The fourth proportional to 287,871.12, 431,819.64 and 88,176.96 is: 132,269.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,871.12 : 431,819.64 = 88,176.96 : x
  2. Step 2: Convert to fraction form
    287,871.12/431,819.64 = 88,176.96/x
  3. Step 3: Cross multiply
    287,871.12x = 431,819.64 × 88,176.96
  4. Step 4: Simplify right side
    287,871.12x = 38,076,543,123.49
  5. Step 5: Solve for x
    x = 38,076,543,123.49/287,871.12
  6. Step 6: Final answer
    x = 132,269.41

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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.