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Finding the Fourth Proportional to 71,489.84, 98,660.64 and 41,280.80

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Solution

The fourth proportional to 71,489.84, 98,660.64 and 41,280.80 is: 56,970.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,489.84 : 98,660.64 = 41,280.80 : x
  2. Step 2: Convert to fraction form
    71,489.84/98,660.64 = 41,280.80/x
  3. Step 3: Cross multiply
    71,489.84x = 98,660.64 × 41,280.80
  4. Step 4: Simplify right side
    71,489.84x = 4,072,790,147.71
  5. Step 5: Solve for x
    x = 4,072,790,147.71/71,489.84
  6. Step 6: Final answer
    x = 56,970.20

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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.