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Finding the Fourth Proportional to 71,461.92, 98,610.94 and 39,630.72

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Solution

The fourth proportional to 71,461.92, 98,610.94 and 39,630.72 is: 54,686.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,461.92 : 98,610.94 = 39,630.72 : x
  2. Step 2: Convert to fraction form
    71,461.92/98,610.94 = 39,630.72/x
  3. Step 3: Cross multiply
    71,461.92x = 98,610.94 × 39,630.72
  4. Step 4: Simplify right side
    71,461.92x = 3,908,022,552.08
  5. Step 5: Solve for x
    x = 3,908,022,552.08/71,461.92
  6. Step 6: Final answer
    x = 54,686.78

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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.