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Finding the Fourth Proportional to 265,498.65, 398,100.38 and 87,908.78

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Solution

The fourth proportional to 265,498.65, 398,100.38 and 87,908.78 is: 131,814.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,498.65 : 398,100.38 = 87,908.78 : x
  2. Step 2: Convert to fraction form
    265,498.65/398,100.38 = 87,908.78/x
  3. Step 3: Cross multiply
    265,498.65x = 398,100.38 × 87,908.78
  4. Step 4: Simplify right side
    265,498.65x = 34,996,519,279.04
  5. Step 5: Solve for x
    x = 34,996,519,279.04/265,498.65
  6. Step 6: Final answer
    x = 131,814.30

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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.