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Finding the Fourth Proportional to 71,217.76, 98,280.08 and 42,550.40

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Solution

The fourth proportional to 71,217.76, 98,280.08 and 42,550.40 is: 58,719.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,217.76 : 98,280.08 = 42,550.40 : x
  2. Step 2: Convert to fraction form
    71,217.76/98,280.08 = 42,550.40/x
  3. Step 3: Cross multiply
    71,217.76x = 98,280.08 × 42,550.40
  4. Step 4: Simplify right side
    71,217.76x = 4,181,856,716.03
  5. Step 5: Solve for x
    x = 4,181,856,716.03/71,217.76
  6. Step 6: Final answer
    x = 58,719.30

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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.