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Finding the Fourth Proportional to 66,470.60, 99,671.70 and 19,717.40

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Solution

The fourth proportional to 66,470.60, 99,671.70 and 19,717.40 is: 29,565.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,470.60 : 99,671.70 = 19,717.40 : x
  2. Step 2: Convert to fraction form
    66,470.60/99,671.70 = 19,717.40/x
  3. Step 3: Cross multiply
    66,470.60x = 99,671.70 × 19,717.40
  4. Step 4: Simplify right side
    66,470.60x = 1,965,266,777.58
  5. Step 5: Solve for x
    x = 1,965,266,777.58/66,470.60
  6. Step 6: Final answer
    x = 29,565.96

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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.