Home / 83,719.08-115,538.76-47,920.32

Finding the Fourth Proportional to 83,719.08, 115,538.76 and 47,920.32

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Solution

The fourth proportional to 83,719.08, 115,538.76 and 47,920.32 is: 66,133.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,719.08 : 115,538.76 = 47,920.32 : x
  2. Step 2: Convert to fraction form
    83,719.08/115,538.76 = 47,920.32/x
  3. Step 3: Cross multiply
    83,719.08x = 115,538.76 × 47,920.32
  4. Step 4: Simplify right side
    83,719.08x = 5,536,654,351.60
  5. Step 5: Solve for x
    x = 5,536,654,351.60/83,719.08
  6. Step 6: Final answer
    x = 66,133.72

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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.