Home / 118,380.20-177,570.30-74,143.40

Finding the Fourth Proportional to 118,380.20, 177,570.30 and 74,143.40

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Solution

The fourth proportional to 118,380.20, 177,570.30 and 74,143.40 is: 111,215.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,380.20 : 177,570.30 = 74,143.40 : x
  2. Step 2: Convert to fraction form
    118,380.20/177,570.30 = 74,143.40/x
  3. Step 3: Cross multiply
    118,380.20x = 177,570.30 × 74,143.40
  4. Step 4: Simplify right side
    118,380.20x = 13,165,665,781.02
  5. Step 5: Solve for x
    x = 13,165,665,781.02/118,380.20
  6. Step 6: Final answer
    x = 111,215.10

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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.