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Finding the Fourth Proportional to 73,001.72, 100,718.78 and 40,731.12

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Solution

The fourth proportional to 73,001.72, 100,718.78 and 40,731.12 is: 56,195.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,001.72 : 100,718.78 = 40,731.12 : x
  2. Step 2: Convert to fraction form
    73,001.72/100,718.78 = 40,731.12/x
  3. Step 3: Cross multiply
    73,001.72x = 100,718.78 × 40,731.12
  4. Step 4: Simplify right side
    73,001.72x = 4,102,388,510.78
  5. Step 5: Solve for x
    x = 4,102,388,510.78/73,001.72
  6. Step 6: Final answer
    x = 56,195.78

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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.