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Finding the Fourth Proportional to 81,346.69, 112,472.64 and 71,246.17

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Solution

The fourth proportional to 81,346.69, 112,472.64 and 71,246.17 is: 98,507.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,346.69 : 112,472.64 = 71,246.17 : x
  2. Step 2: Convert to fraction form
    81,346.69/112,472.64 = 71,246.17/x
  3. Step 3: Cross multiply
    81,346.69x = 112,472.64 × 71,246.17
  4. Step 4: Simplify right side
    81,346.69x = 8,013,244,829.79
  5. Step 5: Solve for x
    x = 8,013,244,829.79/81,346.69
  6. Step 6: Final answer
    x = 98,507.33

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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.