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Finding the Fourth Proportional to 66,470.76, 99,725.58 and 19,724.85

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Solution

The fourth proportional to 66,470.76, 99,725.58 and 19,724.85 is: 29,593.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,470.76 : 99,725.58 = 19,724.85 : x
  2. Step 2: Convert to fraction form
    66,470.76/99,725.58 = 19,724.85/x
  3. Step 3: Cross multiply
    66,470.76x = 99,725.58 × 19,724.85
  4. Step 4: Simplify right side
    66,470.76x = 1,967,072,106.66
  5. Step 5: Solve for x
    x = 1,967,072,106.66/66,470.76
  6. Step 6: Final answer
    x = 29,593.04

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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.