Home / 130,831.20-196,246.80-78,343.20

Finding the Fourth Proportional to 130,831.20, 196,246.80 and 78,343.20

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Solution

The fourth proportional to 130,831.20, 196,246.80 and 78,343.20 is: 117,514.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,831.20 : 196,246.80 = 78,343.20 : x
  2. Step 2: Convert to fraction form
    130,831.20/196,246.80 = 78,343.20/x
  3. Step 3: Cross multiply
    130,831.20x = 196,246.80 × 78,343.20
  4. Step 4: Simplify right side
    130,831.20x = 15,374,602,301.76
  5. Step 5: Solve for x
    x = 15,374,602,301.76/130,831.20
  6. Step 6: Final answer
    x = 117,514.80

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1.5x scale

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.