Home / 83,987.28-115,858.32-49,971.60

Finding the Fourth Proportional to 83,987.28, 115,858.32 and 49,971.60

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Solution

The fourth proportional to 83,987.28, 115,858.32 and 49,971.60 is: 68,934.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,987.28 : 115,858.32 = 49,971.60 : x
  2. Step 2: Convert to fraction form
    83,987.28/115,858.32 = 49,971.60/x
  3. Step 3: Cross multiply
    83,987.28x = 115,858.32 × 49,971.60
  4. Step 4: Simplify right side
    83,987.28x = 5,789,625,623.71
  5. Step 5: Solve for x
    x = 5,789,625,623.71/83,987.28
  6. Step 6: Final answer
    x = 68,934.55

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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.