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Finding the Fourth Proportional to 101,424.70, 151,475.32 and 86,270.31

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Solution

The fourth proportional to 101,424.70, 151,475.32 and 86,270.31 is: 128,842.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,424.70 : 151,475.32 = 86,270.31 : x
  2. Step 2: Convert to fraction form
    101,424.70/151,475.32 = 86,270.31/x
  3. Step 3: Cross multiply
    101,424.70x = 151,475.32 × 86,270.31
  4. Step 4: Simplify right side
    101,424.70x = 13,067,822,813.75
  5. Step 5: Solve for x
    x = 13,067,822,813.75/101,424.70
  6. Step 6: Final answer
    x = 128,842.61

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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.