Home / 90,829.20-125,347.92-54,999

Finding the Fourth Proportional to 90,829.20, 125,347.92 and 54,999

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Solution

The fourth proportional to 90,829.20, 125,347.92 and 54,999 is: 75,900.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,829.20 : 125,347.92 = 54,999 : x
  2. Step 2: Convert to fraction form
    90,829.20/125,347.92 = 54,999/x
  3. Step 3: Cross multiply
    90,829.20x = 125,347.92 × 54,999
  4. Step 4: Simplify right side
    90,829.20x = 6,894,010,252.08
  5. Step 5: Solve for x
    x = 6,894,010,252.08/90,829.20
  6. Step 6: Final answer
    x = 75,900.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.