Home / 90,378.48-124,719-54,565.12

Finding the Fourth Proportional to 90,378.48, 124,719 and 54,565.12

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Solution

The fourth proportional to 90,378.48, 124,719 and 54,565.12 is: 75,297.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,378.48 : 124,719 = 54,565.12 : x
  2. Step 2: Convert to fraction form
    90,378.48/124,719 = 54,565.12/x
  3. Step 3: Cross multiply
    90,378.48x = 124,719 × 54,565.12
  4. Step 4: Simplify right side
    90,378.48x = 6,805,307,201.28
  5. Step 5: Solve for x
    x = 6,805,307,201.28/90,378.48
  6. Step 6: Final answer
    x = 75,297.87

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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.