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Finding the Fourth Proportional to 98,120.86, 135,447.92 and 66,332.80

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Solution

The fourth proportional to 98,120.86, 135,447.92 and 66,332.80 is: 91,567.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,120.86 : 135,447.92 = 66,332.80 : x
  2. Step 2: Convert to fraction form
    98,120.86/135,447.92 = 66,332.80/x
  3. Step 3: Cross multiply
    98,120.86x = 135,447.92 × 66,332.80
  4. Step 4: Simplify right side
    98,120.86x = 8,984,639,787.78
  5. Step 5: Solve for x
    x = 8,984,639,787.78/98,120.86
  6. Step 6: Final answer
    x = 91,567.07

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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.