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Finding the Fourth Proportional to 72,157.53, 99,512.92 and 45,302.55

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Solution

The fourth proportional to 72,157.53, 99,512.92 and 45,302.55 is: 62,477.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,157.53 : 99,512.92 = 45,302.55 : x
  2. Step 2: Convert to fraction form
    72,157.53/99,512.92 = 45,302.55/x
  3. Step 3: Cross multiply
    72,157.53x = 99,512.92 × 45,302.55
  4. Step 4: Simplify right side
    72,157.53x = 4,508,189,033.95
  5. Step 5: Solve for x
    x = 4,508,189,033.95/72,157.53
  6. Step 6: Final answer
    x = 62,477.04

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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.