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Finding the Fourth Proportional to 66,061.46, 91,188.45 and 39,203.97

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Solution

The fourth proportional to 66,061.46, 91,188.45 and 39,203.97 is: 54,115.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,061.46 : 91,188.45 = 39,203.97 : x
  2. Step 2: Convert to fraction form
    66,061.46/91,188.45 = 39,203.97/x
  3. Step 3: Cross multiply
    66,061.46x = 91,188.45 × 39,203.97
  4. Step 4: Simplify right side
    66,061.46x = 3,574,949,258.15
  5. Step 5: Solve for x
    x = 3,574,949,258.15/66,061.46
  6. Step 6: Final answer
    x = 54,115.51

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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.