Home / 115,782.32-159,780.12-65,491.04

Finding the Fourth Proportional to 115,782.32, 159,780.12 and 65,491.04

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Solution

The fourth proportional to 115,782.32, 159,780.12 and 65,491.04 is: 90,377.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,782.32 : 159,780.12 = 65,491.04 : x
  2. Step 2: Convert to fraction form
    115,782.32/159,780.12 = 65,491.04/x
  3. Step 3: Cross multiply
    115,782.32x = 159,780.12 × 65,491.04
  4. Step 4: Simplify right side
    115,782.32x = 10,464,166,230.12
  5. Step 5: Solve for x
    x = 10,464,166,230.12/115,782.32
  6. Step 6: Final answer
    x = 90,377.93

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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.