Home / 272,831.60-409,247.40-85,818.80

Finding the Fourth Proportional to 272,831.60, 409,247.40 and 85,818.80

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Solution

The fourth proportional to 272,831.60, 409,247.40 and 85,818.80 is: 128,728.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,831.60 : 409,247.40 = 85,818.80 : x
  2. Step 2: Convert to fraction form
    272,831.60/409,247.40 = 85,818.80/x
  3. Step 3: Cross multiply
    272,831.60x = 409,247.40 × 85,818.80
  4. Step 4: Simplify right side
    272,831.60x = 35,121,120,771.12
  5. Step 5: Solve for x
    x = 35,121,120,771.12/272,831.60
  6. Step 6: Final answer
    x = 128,728.20

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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.