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Finding the Fourth Proportional to 288,732.20, 432,990.43 and 99,138.74

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Solution

The fourth proportional to 288,732.20, 432,990.43 and 99,138.74 is: 148,671.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,732.20 : 432,990.43 = 99,138.74 : x
  2. Step 2: Convert to fraction form
    288,732.20/432,990.43 = 99,138.74/x
  3. Step 3: Cross multiply
    288,732.20x = 432,990.43 × 99,138.74
  4. Step 4: Simplify right side
    288,732.20x = 42,926,123,249.46
  5. Step 5: Solve for x
    x = 42,926,123,249.46/288,732.20
  6. Step 6: Final answer
    x = 148,671.07

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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.