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Finding the Fourth Proportional to 257,879.87, 386,824.58 and 89,405.69

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Solution

The fourth proportional to 257,879.87, 386,824.58 and 89,405.69 is: 134,110.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,879.87 : 386,824.58 = 89,405.69 : x
  2. Step 2: Convert to fraction form
    257,879.87/386,824.58 = 89,405.69/x
  3. Step 3: Cross multiply
    257,879.87x = 386,824.58 × 89,405.69
  4. Step 4: Simplify right side
    257,879.87x = 34,584,316,549.74
  5. Step 5: Solve for x
    x = 34,584,316,549.74/257,879.87
  6. Step 6: Final answer
    x = 134,110.18

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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.