Home / 138,129.30-206,999.55-102,311.10

Finding the Fourth Proportional to 138,129.30, 206,999.55 and 102,311.10

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Solution

The fourth proportional to 138,129.30, 206,999.55 and 102,311.10 is: 153,322.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,129.30 : 206,999.55 = 102,311.10 : x
  2. Step 2: Convert to fraction form
    138,129.30/206,999.55 = 102,311.10/x
  3. Step 3: Cross multiply
    138,129.30x = 206,999.55 × 102,311.10
  4. Step 4: Simplify right side
    138,129.30x = 21,178,351,660.01
  5. Step 5: Solve for x
    x = 21,178,351,660.01/138,129.30
  6. Step 6: Final answer
    x = 153,322.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.