Home / 115,988.24-160,112.78-78,313.52

Finding the Fourth Proportional to 115,988.24, 160,112.78 and 78,313.52

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Solution

The fourth proportional to 115,988.24, 160,112.78 and 78,313.52 is: 108,105.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,988.24 : 160,112.78 = 78,313.52 : x
  2. Step 2: Convert to fraction form
    115,988.24/160,112.78 = 78,313.52/x
  3. Step 3: Cross multiply
    115,988.24x = 160,112.78 × 78,313.52
  4. Step 4: Simplify right side
    115,988.24x = 12,538,995,398.79
  5. Step 5: Solve for x
    x = 12,538,995,398.79/115,988.24
  6. Step 6: Final answer
    x = 108,105.75

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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.