Home / 90,477.20-135,456.60-80,109.20

Finding the Fourth Proportional to 90,477.20, 135,456.60 and 80,109.20

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Solution

The fourth proportional to 90,477.20, 135,456.60 and 80,109.20 is: 119,934.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,477.20 : 135,456.60 = 80,109.20 : x
  2. Step 2: Convert to fraction form
    90,477.20/135,456.60 = 80,109.20/x
  3. Step 3: Cross multiply
    90,477.20x = 135,456.60 × 80,109.20
  4. Step 4: Simplify right side
    90,477.20x = 10,851,319,860.72
  5. Step 5: Solve for x
    x = 10,851,319,860.72/90,477.20
  6. Step 6: Final answer
    x = 119,934.30

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1.5x scale

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.