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Finding the Fourth Proportional to 72,229.56, 99,680.75 and 40,397.77

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Solution

The fourth proportional to 72,229.56, 99,680.75 and 40,397.77 is: 55,751.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,229.56 : 99,680.75 = 40,397.77 : x
  2. Step 2: Convert to fraction form
    72,229.56/99,680.75 = 40,397.77/x
  3. Step 3: Cross multiply
    72,229.56x = 99,680.75 × 40,397.77
  4. Step 4: Simplify right side
    72,229.56x = 4,026,880,011.93
  5. Step 5: Solve for x
    x = 4,026,880,011.93/72,229.56
  6. Step 6: Final answer
    x = 55,751.14

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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.