Home / 87,219.20-130,828.80-74,129.60

Finding the Fourth Proportional to 87,219.20, 130,828.80 and 74,129.60

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Solution

The fourth proportional to 87,219.20, 130,828.80 and 74,129.60 is: 111,194.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,219.20 : 130,828.80 = 74,129.60 : x
  2. Step 2: Convert to fraction form
    87,219.20/130,828.80 = 74,129.60/x
  3. Step 3: Cross multiply
    87,219.20x = 130,828.80 × 74,129.60
  4. Step 4: Simplify right side
    87,219.20x = 9,698,286,612.48
  5. Step 5: Solve for x
    x = 9,698,286,612.48/87,219.20
  6. Step 6: Final answer
    x = 111,194.40

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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.