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Finding the Fourth Proportional to 72,051.52, 108,115.32 and 51,126.76

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Solution

The fourth proportional to 72,051.52, 108,115.32 and 51,126.76 is: 76,717.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,051.52 : 108,115.32 = 51,126.76 : x
  2. Step 2: Convert to fraction form
    72,051.52/108,115.32 = 51,126.76/x
  3. Step 3: Cross multiply
    72,051.52x = 108,115.32 × 51,126.76
  4. Step 4: Simplify right side
    72,051.52x = 5,527,586,017.96
  5. Step 5: Solve for x
    x = 5,527,586,017.96/72,051.52
  6. Step 6: Final answer
    x = 76,717.13

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1.5x scale

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.