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Finding the Fourth Proportional to 131,363.50, 181,285.96 and 71,747.50

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Solution

The fourth proportional to 131,363.50, 181,285.96 and 71,747.50 is: 99,013.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,363.50 : 181,285.96 = 71,747.50 : x
  2. Step 2: Convert to fraction form
    131,363.50/181,285.96 = 71,747.50/x
  3. Step 3: Cross multiply
    131,363.50x = 181,285.96 × 71,747.50
  4. Step 4: Simplify right side
    131,363.50x = 13,006,814,415.10
  5. Step 5: Solve for x
    x = 13,006,814,415.10/131,363.50
  6. Step 6: Final answer
    x = 99,013.91

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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.