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Finding the Fourth Proportional to 81,110.97, 121,666.56 and 21,951.30

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Solution

The fourth proportional to 81,110.97, 121,666.56 and 21,951.30 is: 32,926.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,110.97 : 121,666.56 = 21,951.30 : x
  2. Step 2: Convert to fraction form
    81,110.97/121,666.56 = 21,951.30/x
  3. Step 3: Cross multiply
    81,110.97x = 121,666.56 × 21,951.30
  4. Step 4: Simplify right side
    81,110.97x = 2,670,739,532.46
  5. Step 5: Solve for x
    x = 2,670,739,532.46/81,110.97
  6. Step 6: Final answer
    x = 32,926.98

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1.5x scale

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.