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Finding the Fourth Proportional to 145,153.92, 217,709.76 and 45,290.88

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Solution

The fourth proportional to 145,153.92, 217,709.76 and 45,290.88 is: 67,929.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,153.92 : 217,709.76 = 45,290.88 : x
  2. Step 2: Convert to fraction form
    145,153.92/217,709.76 = 45,290.88/x
  3. Step 3: Cross multiply
    145,153.92x = 217,709.76 × 45,290.88
  4. Step 4: Simplify right side
    145,153.92x = 9,860,266,614.99
  5. Step 5: Solve for x
    x = 9,860,266,614.99/145,153.92
  6. Step 6: Final answer
    x = 67,929.73

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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.