Home / 138,831.60-207,955.80-76,429.20

Finding the Fourth Proportional to 138,831.60, 207,955.80 and 76,429.20

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Solution

The fourth proportional to 138,831.60, 207,955.80 and 76,429.20 is: 114,483.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,831.60 : 207,955.80 = 76,429.20 : x
  2. Step 2: Convert to fraction form
    138,831.60/207,955.80 = 76,429.20/x
  3. Step 3: Cross multiply
    138,831.60x = 207,955.80 × 76,429.20
  4. Step 4: Simplify right side
    138,831.60x = 15,893,895,429.36
  5. Step 5: Solve for x
    x = 15,893,895,429.36/138,831.60
  6. Step 6: Final answer
    x = 114,483.27

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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.