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Finding the Fourth Proportional to 66,356.97, 91,574.72 and 36,143.20

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Solution

The fourth proportional to 66,356.97, 91,574.72 and 36,143.20 is: 49,878.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,356.97 : 91,574.72 = 36,143.20 : x
  2. Step 2: Convert to fraction form
    66,356.97/91,574.72 = 36,143.20/x
  3. Step 3: Cross multiply
    66,356.97x = 91,574.72 × 36,143.20
  4. Step 4: Simplify right side
    66,356.97x = 3,309,803,419.90
  5. Step 5: Solve for x
    x = 3,309,803,419.90/66,356.97
  6. Step 6: Final answer
    x = 49,878.76

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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.