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Finding the Fourth Proportional to 66,506.88, 99,721.92 and 45,472.39

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Solution

The fourth proportional to 66,506.88, 99,721.92 and 45,472.39 is: 68,182.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,506.88 : 99,721.92 = 45,472.39 : x
  2. Step 2: Convert to fraction form
    66,506.88/99,721.92 = 45,472.39/x
  3. Step 3: Cross multiply
    66,506.88x = 99,721.92 × 45,472.39
  4. Step 4: Simplify right side
    66,506.88x = 4,534,594,264.16
  5. Step 5: Solve for x
    x = 4,534,594,264.16/66,506.88
  6. Step 6: Final answer
    x = 68,182.34

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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.