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Finding the Fourth Proportional to 72,060.68, 99,431.88 and 40,224.44

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Solution

The fourth proportional to 72,060.68, 99,431.88 and 40,224.44 is: 55,503.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,060.68 : 99,431.88 = 40,224.44 : x
  2. Step 2: Convert to fraction form
    72,060.68/99,431.88 = 40,224.44/x
  3. Step 3: Cross multiply
    72,060.68x = 99,431.88 × 40,224.44
  4. Step 4: Simplify right side
    72,060.68x = 3,999,591,691.15
  5. Step 5: Solve for x
    x = 3,999,591,691.15/72,060.68
  6. Step 6: Final answer
    x = 55,503.11

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1.5x scale

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.