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Finding the Fourth Proportional to 72,931.88, 109,397.93 and 48,082.91

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Solution

The fourth proportional to 72,931.88, 109,397.93 and 48,082.91 is: 72,124.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,931.88 : 109,397.93 = 48,082.91 : x
  2. Step 2: Convert to fraction form
    72,931.88/109,397.93 = 48,082.91/x
  3. Step 3: Cross multiply
    72,931.88x = 109,397.93 × 48,082.91
  4. Step 4: Simplify right side
    72,931.88x = 5,260,170,034.97
  5. Step 5: Solve for x
    x = 5,260,170,034.97/72,931.88
  6. Step 6: Final answer
    x = 72,124.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.