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Finding the Fourth Proportional to 145,115.38, 217,631.72 and 56,349.90

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Solution

The fourth proportional to 145,115.38, 217,631.72 and 56,349.90 is: 84,508.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,115.38 : 217,631.72 = 56,349.90 : x
  2. Step 2: Convert to fraction form
    145,115.38/217,631.72 = 56,349.90/x
  3. Step 3: Cross multiply
    145,115.38x = 217,631.72 × 56,349.90
  4. Step 4: Simplify right side
    145,115.38x = 12,263,525,658.83
  5. Step 5: Solve for x
    x = 12,263,525,658.83/145,115.38
  6. Step 6: Final answer
    x = 84,508.79

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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.