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Finding the Fourth Proportional to 66,170.53, 99,199.98 and 28,702.40

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Solution

The fourth proportional to 66,170.53, 99,199.98 and 28,702.40 is: 43,029.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,170.53 : 99,199.98 = 28,702.40 : x
  2. Step 2: Convert to fraction form
    66,170.53/99,199.98 = 28,702.40/x
  3. Step 3: Cross multiply
    66,170.53x = 99,199.98 × 28,702.40
  4. Step 4: Simplify right side
    66,170.53x = 2,847,277,505.95
  5. Step 5: Solve for x
    x = 2,847,277,505.95/66,170.53
  6. Step 6: Final answer
    x = 43,029.39

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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.