Home / 90,001.20-134,839.80-71,403.60

Finding the Fourth Proportional to 90,001.20, 134,839.80 and 71,403.60

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Solution

The fourth proportional to 90,001.20, 134,839.80 and 71,403.60 is: 106,976.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,001.20 : 134,839.80 = 71,403.60 : x
  2. Step 2: Convert to fraction form
    90,001.20/134,839.80 = 71,403.60/x
  3. Step 3: Cross multiply
    90,001.20x = 134,839.80 × 71,403.60
  4. Step 4: Simplify right side
    90,001.20x = 9,628,047,143.28
  5. Step 5: Solve for x
    x = 9,628,047,143.28/90,001.20
  6. Step 6: Final answer
    x = 106,976.88

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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.