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Finding the Fourth Proportional to 72,195.03, 99,630.68 and 40,363.25

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Solution

The fourth proportional to 72,195.03, 99,630.68 and 40,363.25 is: 55,702.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,195.03 : 99,630.68 = 40,363.25 : x
  2. Step 2: Convert to fraction form
    72,195.03/99,630.68 = 40,363.25/x
  3. Step 3: Cross multiply
    72,195.03x = 99,630.68 × 40,363.25
  4. Step 4: Simplify right side
    72,195.03x = 4,021,417,344.54
  5. Step 5: Solve for x
    x = 4,021,417,344.54/72,195.03
  6. Step 6: Final answer
    x = 55,702.14

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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.