Home / 66,995.12-92,456.20-40,142

Finding the Fourth Proportional to 66,995.12, 92,456.20 and 40,142

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Solution

The fourth proportional to 66,995.12, 92,456.20 and 40,142 is: 55,397.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,995.12 : 92,456.20 = 40,142 : x
  2. Step 2: Convert to fraction form
    66,995.12/92,456.20 = 40,142/x
  3. Step 3: Cross multiply
    66,995.12x = 92,456.20 × 40,142
  4. Step 4: Simplify right side
    66,995.12x = 3,711,376,780.40
  5. Step 5: Solve for x
    x = 3,711,376,780.40/66,995.12
  6. Step 6: Final answer
    x = 55,397.72

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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.