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Finding the Fourth Proportional to 83,791.53, 115,626.15 and 47,980.62

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Solution

The fourth proportional to 83,791.53, 115,626.15 and 47,980.62 is: 66,209.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,791.53 : 115,626.15 = 47,980.62 : x
  2. Step 2: Convert to fraction form
    83,791.53/115,626.15 = 47,980.62/x
  3. Step 3: Cross multiply
    83,791.53x = 115,626.15 × 47,980.62
  4. Step 4: Simplify right side
    83,791.53x = 5,547,814,365.21
  5. Step 5: Solve for x
    x = 5,547,814,365.21/83,791.53
  6. Step 6: Final answer
    x = 66,209.73

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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.