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Finding the Fourth Proportional to 81,715.32, 112,754.84 and 45,898.47

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Solution

The fourth proportional to 81,715.32, 112,754.84 and 45,898.47 is: 63,332.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,715.32 : 112,754.84 = 45,898.47 : x
  2. Step 2: Convert to fraction form
    81,715.32/112,754.84 = 45,898.47/x
  3. Step 3: Cross multiply
    81,715.32x = 112,754.84 × 45,898.47
  4. Step 4: Simplify right side
    81,715.32x = 5,175,274,411.60
  5. Step 5: Solve for x
    x = 5,175,274,411.60/81,715.32
  6. Step 6: Final answer
    x = 63,332.98

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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.