Home / 115,780.32-159,777.36-65,489.04

Finding the Fourth Proportional to 115,780.32, 159,777.36 and 65,489.04

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Solution

The fourth proportional to 115,780.32, 159,777.36 and 65,489.04 is: 90,375.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,780.32 : 159,777.36 = 65,489.04 : x
  2. Step 2: Convert to fraction form
    115,780.32/159,777.36 = 65,489.04/x
  3. Step 3: Cross multiply
    115,780.32x = 159,777.36 × 65,489.04
  4. Step 4: Simplify right side
    115,780.32x = 10,463,665,920.13
  5. Step 5: Solve for x
    x = 10,463,665,920.13/115,780.32
  6. Step 6: Final answer
    x = 90,375.17

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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.