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Finding the Fourth Proportional to 81,272.59, 112,178.71 and 47,287.64

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Solution

The fourth proportional to 81,272.59, 112,178.71 and 47,287.64 is: 65,270.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,272.59 : 112,178.71 = 47,287.64 : x
  2. Step 2: Convert to fraction form
    81,272.59/112,178.71 = 47,287.64/x
  3. Step 3: Cross multiply
    81,272.59x = 112,178.71 × 47,287.64
  4. Step 4: Simplify right side
    81,272.59x = 5,304,665,893.25
  5. Step 5: Solve for x
    x = 5,304,665,893.25/81,272.59
  6. Step 6: Final answer
    x = 65,270.05

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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.