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Finding the Fourth Proportional to 66,517.40, 99,776.10 and 65,205.20

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Solution

The fourth proportional to 66,517.40, 99,776.10 and 65,205.20 is: 97,807.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,517.40 : 99,776.10 = 65,205.20 : x
  2. Step 2: Convert to fraction form
    66,517.40/99,776.10 = 65,205.20/x
  3. Step 3: Cross multiply
    66,517.40x = 99,776.10 × 65,205.20
  4. Step 4: Simplify right side
    66,517.40x = 6,505,920,555.72
  5. Step 5: Solve for x
    x = 6,505,920,555.72/66,517.40
  6. Step 6: Final answer
    x = 97,807.80

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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.