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Finding the Fourth Proportional to 66,465.78, 91,724.28 and 37,780.92

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Solution

The fourth proportional to 66,465.78, 91,724.28 and 37,780.92 is: 52,138.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,465.78 : 91,724.28 = 37,780.92 : x
  2. Step 2: Convert to fraction form
    66,465.78/91,724.28 = 37,780.92/x
  3. Step 3: Cross multiply
    66,465.78x = 91,724.28 × 37,780.92
  4. Step 4: Simplify right side
    66,465.78x = 3,465,427,684.74
  5. Step 5: Solve for x
    x = 3,465,427,684.74/66,465.78
  6. Step 6: Final answer
    x = 52,138.52

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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.