Home / 47,986.20-71,979.30-42,445.80

Finding the Fourth Proportional to 47,986.20, 71,979.30 and 42,445.80

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Solution

The fourth proportional to 47,986.20, 71,979.30 and 42,445.80 is: 63,668.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,986.20 : 71,979.30 = 42,445.80 : x
  2. Step 2: Convert to fraction form
    47,986.20/71,979.30 = 42,445.80/x
  3. Step 3: Cross multiply
    47,986.20x = 71,979.30 × 42,445.80
  4. Step 4: Simplify right side
    47,986.20x = 3,055,218,971.94
  5. Step 5: Solve for x
    x = 3,055,218,971.94/47,986.20
  6. Step 6: Final answer
    x = 63,668.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.