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Finding the Fourth Proportional to 101,545.72, 140,148.57 and 63,311.47

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Solution

The fourth proportional to 101,545.72, 140,148.57 and 63,311.47 is: 87,379.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,545.72 : 140,148.57 = 63,311.47 : x
  2. Step 2: Convert to fraction form
    101,545.72/140,148.57 = 63,311.47/x
  3. Step 3: Cross multiply
    101,545.72x = 140,148.57 × 63,311.47
  4. Step 4: Simplify right side
    101,545.72x = 8,873,011,985.10
  5. Step 5: Solve for x
    x = 8,873,011,985.10/101,545.72
  6. Step 6: Final answer
    x = 87,379.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.