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Finding the Fourth Proportional to 81,680.94, 112,486.32 and 73,545.30

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Solution

The fourth proportional to 81,680.94, 112,486.32 and 73,545.30 is: 101,282.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,680.94 : 112,486.32 = 73,545.30 : x
  2. Step 2: Convert to fraction form
    81,680.94/112,486.32 = 73,545.30/x
  3. Step 3: Cross multiply
    81,680.94x = 112,486.32 × 73,545.30
  4. Step 4: Simplify right side
    81,680.94x = 8,272,840,150.30
  5. Step 5: Solve for x
    x = 8,272,840,150.30/81,680.94
  6. Step 6: Final answer
    x = 101,282.38

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1.5x scale

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.