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Finding the Fourth Proportional to 66,397.64, 99,492.64 and 41,721.80

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Solution

The fourth proportional to 66,397.64, 99,492.64 and 41,721.80 is: 62,517.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,397.64 : 99,492.64 = 41,721.80 : x
  2. Step 2: Convert to fraction form
    66,397.64/99,492.64 = 41,721.80/x
  3. Step 3: Cross multiply
    66,397.64x = 99,492.64 × 41,721.80
  4. Step 4: Simplify right side
    66,397.64x = 4,151,012,027.55
  5. Step 5: Solve for x
    x = 4,151,012,027.55/66,397.64
  6. Step 6: Final answer
    x = 62,517.46

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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.