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Finding the Fourth Proportional to 66,140.80, 91,272.72 and 37,844.68

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Solution

The fourth proportional to 66,140.80, 91,272.72 and 37,844.68 is: 52,224.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,140.80 : 91,272.72 = 37,844.68 : x
  2. Step 2: Convert to fraction form
    66,140.80/91,272.72 = 37,844.68/x
  3. Step 3: Cross multiply
    66,140.80x = 91,272.72 × 37,844.68
  4. Step 4: Simplify right side
    66,140.80x = 3,454,186,881.13
  5. Step 5: Solve for x
    x = 3,454,186,881.13/66,140.80
  6. Step 6: Final answer
    x = 52,224.75

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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.