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Finding the Fourth Proportional to 101,423.70, 151,473.83 and 86,269.31

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Solution

The fourth proportional to 101,423.70, 151,473.83 and 86,269.31 is: 128,841.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,423.70 : 151,473.83 = 86,269.31 : x
  2. Step 2: Convert to fraction form
    101,423.70/151,473.83 = 86,269.31/x
  3. Step 3: Cross multiply
    101,423.70x = 151,473.83 × 86,269.31
  4. Step 4: Simplify right side
    101,423.70x = 13,067,541,608.44
  5. Step 5: Solve for x
    x = 13,067,541,608.44/101,423.70
  6. Step 6: Final answer
    x = 128,841.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.