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Finding the Fourth Proportional to 69,669, 96,146.87 and 40,990.14

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Solution

The fourth proportional to 69,669, 96,146.87 and 40,990.14 is: 56,568.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,669 : 96,146.87 = 40,990.14 : x
  2. Step 2: Convert to fraction form
    69,669/96,146.87 = 40,990.14/x
  3. Step 3: Cross multiply
    69,669x = 96,146.87 × 40,990.14
  4. Step 4: Simplify right side
    69,669x = 3,941,073,456.91
  5. Step 5: Solve for x
    x = 3,941,073,456.91/69,669
  6. Step 6: Final answer
    x = 56,568.54

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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.