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Finding the Fourth Proportional to 81,133.52, 121,535.03 and 66,193.88

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Solution

The fourth proportional to 81,133.52, 121,535.03 and 66,193.88 is: 99,156.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,133.52 : 121,535.03 = 66,193.88 : x
  2. Step 2: Convert to fraction form
    81,133.52/121,535.03 = 66,193.88/x
  3. Step 3: Cross multiply
    81,133.52x = 121,535.03 × 66,193.88
  4. Step 4: Simplify right side
    81,133.52x = 8,044,874,749.43
  5. Step 5: Solve for x
    x = 8,044,874,749.43/81,133.52
  6. Step 6: Final answer
    x = 99,156.00

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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.