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Finding the Fourth Proportional to 83,076.64, 124,614.96 and 66,358.40

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Solution

The fourth proportional to 83,076.64, 124,614.96 and 66,358.40 is: 99,537.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,076.64 : 124,614.96 = 66,358.40 : x
  2. Step 2: Convert to fraction form
    83,076.64/124,614.96 = 66,358.40/x
  3. Step 3: Cross multiply
    83,076.64x = 124,614.96 × 66,358.40
  4. Step 4: Simplify right side
    83,076.64x = 8,269,248,738.59
  5. Step 5: Solve for x
    x = 8,269,248,738.59/83,076.64
  6. Step 6: Final answer
    x = 99,537.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.