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Finding the Fourth Proportional to 81,158.16, 111,979.04 and 47,146.44

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Solution

The fourth proportional to 81,158.16, 111,979.04 and 47,146.44 is: 65,050.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,158.16 : 111,979.04 = 47,146.44 : x
  2. Step 2: Convert to fraction form
    81,158.16/111,979.04 = 47,146.44/x
  3. Step 3: Cross multiply
    81,158.16x = 111,979.04 × 47,146.44
  4. Step 4: Simplify right side
    81,158.16x = 5,279,413,090.62
  5. Step 5: Solve for x
    x = 5,279,413,090.62/81,158.16
  6. Step 6: Final answer
    x = 65,050.92

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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.