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Finding the Fourth Proportional to 79,959.02, 110,810.18 and 78,831.50

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Solution

The fourth proportional to 79,959.02, 110,810.18 and 78,831.50 is: 109,247.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,959.02 : 110,810.18 = 78,831.50 : x
  2. Step 2: Convert to fraction form
    79,959.02/110,810.18 = 78,831.50/x
  3. Step 3: Cross multiply
    79,959.02x = 110,810.18 × 78,831.50
  4. Step 4: Simplify right side
    79,959.02x = 8,735,332,704.67
  5. Step 5: Solve for x
    x = 8,735,332,704.67/79,959.02
  6. Step 6: Final answer
    x = 109,247.62

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.