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Finding the Fourth Proportional to 71,105.76, 98,126.88 and 40,891.68

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Solution

The fourth proportional to 71,105.76, 98,126.88 and 40,891.68 is: 56,431.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,105.76 : 98,126.88 = 40,891.68 : x
  2. Step 2: Convert to fraction form
    71,105.76/98,126.88 = 40,891.68/x
  3. Step 3: Cross multiply
    71,105.76x = 98,126.88 × 40,891.68
  4. Step 4: Simplify right side
    71,105.76x = 4,012,572,976.36
  5. Step 5: Solve for x
    x = 4,012,572,976.36/71,105.76
  6. Step 6: Final answer
    x = 56,431.05

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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.