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Finding the Fourth Proportional to 75,128.91, 112,674.90 and 25,207.90

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Solution

The fourth proportional to 75,128.91, 112,674.90 and 25,207.90 is: 37,805.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,128.91 : 112,674.90 = 25,207.90 : x
  2. Step 2: Convert to fraction form
    75,128.91/112,674.90 = 25,207.90/x
  3. Step 3: Cross multiply
    75,128.91x = 112,674.90 × 25,207.90
  4. Step 4: Simplify right side
    75,128.91x = 2,840,297,611.71
  5. Step 5: Solve for x
    x = 2,840,297,611.71/75,128.91
  6. Step 6: Final answer
    x = 37,805.65

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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.