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Finding the Fourth Proportional to 96,449.25, 133,134.91 and 78,513.12

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Solution

The fourth proportional to 96,449.25, 133,134.91 and 78,513.12 is: 108,376.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,449.25 : 133,134.91 = 78,513.12 : x
  2. Step 2: Convert to fraction form
    96,449.25/133,134.91 = 78,513.12/x
  3. Step 3: Cross multiply
    96,449.25x = 133,134.91 × 78,513.12
  4. Step 4: Simplify right side
    96,449.25x = 10,452,836,968.74
  5. Step 5: Solve for x
    x = 10,452,836,968.74/96,449.25
  6. Step 6: Final answer
    x = 108,376.55

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1.5x scale

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.