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Finding the Fourth Proportional to 72,531.66, 100,103.64 and 40,702.44

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Solution

The fourth proportional to 72,531.66, 100,103.64 and 40,702.44 is: 56,174.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,531.66 : 100,103.64 = 40,702.44 : x
  2. Step 2: Convert to fraction form
    72,531.66/100,103.64 = 40,702.44/x
  3. Step 3: Cross multiply
    72,531.66x = 100,103.64 × 40,702.44
  4. Step 4: Simplify right side
    72,531.66x = 4,074,462,400.88
  5. Step 5: Solve for x
    x = 4,074,462,400.88/72,531.66
  6. Step 6: Final answer
    x = 56,174.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.