Home / 131,815.91-181,905.05-71,385.17

Finding the Fourth Proportional to 131,815.91, 181,905.05 and 71,385.17

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Solution

The fourth proportional to 131,815.91, 181,905.05 and 71,385.17 is: 98,511.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,815.91 : 181,905.05 = 71,385.17 : x
  2. Step 2: Convert to fraction form
    131,815.91/181,905.05 = 71,385.17/x
  3. Step 3: Cross multiply
    131,815.91x = 181,905.05 × 71,385.17
  4. Step 4: Simplify right side
    131,815.91x = 12,985,323,015.95
  5. Step 5: Solve for x
    x = 12,985,323,015.95/131,815.91
  6. Step 6: Final answer
    x = 98,511.04

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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.