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Finding the Fourth Proportional to 78,881.55, 108,860.97 and 43,074.90

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Solution

The fourth proportional to 78,881.55, 108,860.97 and 43,074.90 is: 59,445.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,881.55 : 108,860.97 = 43,074.90 : x
  2. Step 2: Convert to fraction form
    78,881.55/108,860.97 = 43,074.90/x
  3. Step 3: Cross multiply
    78,881.55x = 108,860.97 × 43,074.90
  4. Step 4: Simplify right side
    78,881.55x = 4,689,175,396.65
  5. Step 5: Solve for x
    x = 4,689,175,396.65/78,881.55
  6. Step 6: Final answer
    x = 59,445.78

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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.