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Finding the Fourth Proportional to 235,978.79, 325,649.15 and 128,548.90

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Solution

The fourth proportional to 235,978.79, 325,649.15 and 128,548.90 is: 177,396.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,978.79 : 325,649.15 = 128,548.90 : x
  2. Step 2: Convert to fraction form
    235,978.79/325,649.15 = 128,548.90/x
  3. Step 3: Cross multiply
    235,978.79x = 325,649.15 × 128,548.90
  4. Step 4: Simplify right side
    235,978.79x = 41,861,838,561.57
  5. Step 5: Solve for x
    x = 41,861,838,561.57/235,978.79
  6. Step 6: Final answer
    x = 177,396.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.