Home / 115,420.12-159,279.08-64,429.88

Finding the Fourth Proportional to 115,420.12, 159,279.08 and 64,429.88

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Solution

The fourth proportional to 115,420.12, 159,279.08 and 64,429.88 is: 88,912.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,420.12 : 159,279.08 = 64,429.88 : x
  2. Step 2: Convert to fraction form
    115,420.12/159,279.08 = 64,429.88/x
  3. Step 3: Cross multiply
    115,420.12x = 159,279.08 × 64,429.88
  4. Step 4: Simplify right side
    115,420.12x = 10,262,332,010.91
  5. Step 5: Solve for x
    x = 10,262,332,010.91/115,420.12
  6. Step 6: Final answer
    x = 88,912.85

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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.