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Finding the Fourth Proportional to 66,458.66, 91,718.39 and 37,787.32

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Solution

The fourth proportional to 66,458.66, 91,718.39 and 37,787.32 is: 52,149.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,458.66 : 91,718.39 = 37,787.32 : x
  2. Step 2: Convert to fraction form
    66,458.66/91,718.39 = 37,787.32/x
  3. Step 3: Cross multiply
    66,458.66x = 91,718.39 × 37,787.32
  4. Step 4: Simplify right side
    66,458.66x = 3,465,791,505.29
  5. Step 5: Solve for x
    x = 3,465,791,505.29/66,458.66
  6. Step 6: Final answer
    x = 52,149.58

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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.