Home / 90,215.40-124,479.54-51,447.72

Finding the Fourth Proportional to 90,215.40, 124,479.54 and 51,447.72

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Solution

The fourth proportional to 90,215.40, 124,479.54 and 51,447.72 is: 70,987.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,215.40 : 124,479.54 = 51,447.72 : x
  2. Step 2: Convert to fraction form
    90,215.40/124,479.54 = 51,447.72/x
  3. Step 3: Cross multiply
    90,215.40x = 124,479.54 × 51,447.72
  4. Step 4: Simplify right side
    90,215.40x = 6,404,188,519.65
  5. Step 5: Solve for x
    x = 6,404,188,519.65/90,215.40
  6. Step 6: Final answer
    x = 70,987.75

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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.