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Finding the Fourth Proportional to 66,357.47, 91,575.41 and 36,143.70

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Solution

The fourth proportional to 66,357.47, 91,575.41 and 36,143.70 is: 49,879.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,357.47 : 91,575.41 = 36,143.70 : x
  2. Step 2: Convert to fraction form
    66,357.47/91,575.41 = 36,143.70/x
  3. Step 3: Cross multiply
    66,357.47x = 91,575.41 × 36,143.70
  4. Step 4: Simplify right side
    66,357.47x = 3,309,874,146.42
  5. Step 5: Solve for x
    x = 3,309,874,146.42/66,357.47
  6. Step 6: Final answer
    x = 49,879.45

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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.