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Finding the Fourth Proportional to 250,721.10, 375,728.02 and 138,451.86

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Solution

The fourth proportional to 250,721.10, 375,728.02 and 138,451.86 is: 207,482.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,721.10 : 375,728.02 = 138,451.86 : x
  2. Step 2: Convert to fraction form
    250,721.10/375,728.02 = 138,451.86/x
  3. Step 3: Cross multiply
    250,721.10x = 375,728.02 × 138,451.86
  4. Step 4: Simplify right side
    250,721.10x = 52,020,242,876.99
  5. Step 5: Solve for x
    x = 52,020,242,876.99/250,721.10
  6. Step 6: Final answer
    x = 207,482.51

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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.