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Finding the Fourth Proportional to 71,461.50, 98,616.90 and 39,635.28

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Solution

The fourth proportional to 71,461.50, 98,616.90 and 39,635.28 is: 54,696.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,461.50 : 98,616.90 = 39,635.28 : x
  2. Step 2: Convert to fraction form
    71,461.50/98,616.90 = 39,635.28/x
  3. Step 3: Cross multiply
    71,461.50x = 98,616.90 × 39,635.28
  4. Step 4: Simplify right side
    71,461.50x = 3,908,708,444.23
  5. Step 5: Solve for x
    x = 3,908,708,444.23/71,461.50
  6. Step 6: Final answer
    x = 54,696.70

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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.