Home / 107,979.95-161,736.21-78,332.46

Finding the Fourth Proportional to 107,979.95, 161,736.21 and 78,332.46

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Solution

The fourth proportional to 107,979.95, 161,736.21 and 78,332.46 is: 117,329.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,979.95 : 161,736.21 = 78,332.46 : x
  2. Step 2: Convert to fraction form
    107,979.95/161,736.21 = 78,332.46/x
  3. Step 3: Cross multiply
    107,979.95x = 161,736.21 × 78,332.46
  4. Step 4: Simplify right side
    107,979.95x = 12,669,195,200.38
  5. Step 5: Solve for x
    x = 12,669,195,200.38/107,979.95
  6. Step 6: Final answer
    x = 117,329.15

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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.