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Finding the Fourth Proportional to 81,549.78, 112,529.70 and 45,732.42

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Solution

The fourth proportional to 81,549.78, 112,529.70 and 45,732.42 is: 63,105.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,549.78 : 112,529.70 = 45,732.42 : x
  2. Step 2: Convert to fraction form
    81,549.78/112,529.70 = 45,732.42/x
  3. Step 3: Cross multiply
    81,549.78x = 112,529.70 × 45,732.42
  4. Step 4: Simplify right side
    81,549.78x = 5,146,255,502.87
  5. Step 5: Solve for x
    x = 5,146,255,502.87/81,549.78
  6. Step 6: Final answer
    x = 63,105.69

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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.