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Finding the Fourth Proportional to 250,712.91, 375,715.80 and 138,443.67

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Solution

The fourth proportional to 250,712.91, 375,715.80 and 138,443.67 is: 207,470.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,712.91 : 375,715.80 = 138,443.67 : x
  2. Step 2: Convert to fraction form
    250,712.91/375,715.80 = 138,443.67/x
  3. Step 3: Cross multiply
    250,712.91x = 375,715.80 × 138,443.67
  4. Step 4: Simplify right side
    250,712.91x = 52,015,474,228.99
  5. Step 5: Solve for x
    x = 52,015,474,228.99/250,712.91
  6. Step 6: Final answer
    x = 207,470.27

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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.