Home / 107,831.20-161,779.20-76,727.20

Finding the Fourth Proportional to 107,831.20, 161,779.20 and 76,727.20

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Solution

The fourth proportional to 107,831.20, 161,779.20 and 76,727.20 is: 115,113.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,831.20 : 161,779.20 = 76,727.20 : x
  2. Step 2: Convert to fraction form
    107,831.20/161,779.20 = 76,727.20/x
  3. Step 3: Cross multiply
    107,831.20x = 161,779.20 × 76,727.20
  4. Step 4: Simplify right side
    107,831.20x = 12,412,865,034.24
  5. Step 5: Solve for x
    x = 12,412,865,034.24/107,831.20
  6. Step 6: Final answer
    x = 115,113.85

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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.