Home / 81,470.20-122,116.20-28,852.60

Finding the Fourth Proportional to 81,470.20, 122,116.20 and 28,852.60

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Solution

The fourth proportional to 81,470.20, 122,116.20 and 28,852.60 is: 43,247.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,470.20 : 122,116.20 = 28,852.60 : x
  2. Step 2: Convert to fraction form
    81,470.20/122,116.20 = 28,852.60/x
  3. Step 3: Cross multiply
    81,470.20x = 122,116.20 × 28,852.60
  4. Step 4: Simplify right side
    81,470.20x = 3,523,369,872.12
  5. Step 5: Solve for x
    x = 3,523,369,872.12/81,470.20
  6. Step 6: Final answer
    x = 43,247.35

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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.