Home / 86,831.60-129,901.80-75,273.20

Finding the Fourth Proportional to 86,831.60, 129,901.80 and 75,273.20

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Solution

The fourth proportional to 86,831.60, 129,901.80 and 75,273.20 is: 112,610.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,831.60 : 129,901.80 = 75,273.20 : x
  2. Step 2: Convert to fraction form
    86,831.60/129,901.80 = 75,273.20/x
  3. Step 3: Cross multiply
    86,831.60x = 129,901.80 × 75,273.20
  4. Step 4: Simplify right side
    86,831.60x = 9,778,124,171.76
  5. Step 5: Solve for x
    x = 9,778,124,171.76/86,831.60
  6. Step 6: Final answer
    x = 112,610.20

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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.