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Finding the Fourth Proportional to 71,070, 98,079.76 and 40,865.12

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Solution

The fourth proportional to 71,070, 98,079.76 and 40,865.12 is: 56,395.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,070 : 98,079.76 = 40,865.12 : x
  2. Step 2: Convert to fraction form
    71,070/98,079.76 = 40,865.12/x
  3. Step 3: Cross multiply
    71,070x = 98,079.76 × 40,865.12
  4. Step 4: Simplify right side
    71,070x = 4,008,041,161.97
  5. Step 5: Solve for x
    x = 4,008,041,161.97/71,070
  6. Step 6: Final answer
    x = 56,395.68

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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.