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Finding the Fourth Proportional to 66,470.10, 99,763.47 and 36,921.30

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Solution

The fourth proportional to 66,470.10, 99,763.47 and 36,921.30 is: 55,414.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,470.10 : 99,763.47 = 36,921.30 : x
  2. Step 2: Convert to fraction form
    66,470.10/99,763.47 = 36,921.30/x
  3. Step 3: Cross multiply
    66,470.10x = 99,763.47 × 36,921.30
  4. Step 4: Simplify right side
    66,470.10x = 3,683,397,004.91
  5. Step 5: Solve for x
    x = 3,683,397,004.91/66,470.10
  6. Step 6: Final answer
    x = 55,414.34

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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.