Home / 78,942.88-108,937.76-43,131.20

Finding the Fourth Proportional to 78,942.88, 108,937.76 and 43,131.20

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Solution

The fourth proportional to 78,942.88, 108,937.76 and 43,131.20 is: 59,519.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,942.88 : 108,937.76 = 43,131.20 : x
  2. Step 2: Convert to fraction form
    78,942.88/108,937.76 = 43,131.20/x
  3. Step 3: Cross multiply
    78,942.88x = 108,937.76 × 43,131.20
  4. Step 4: Simplify right side
    78,942.88x = 4,698,616,314.11
  5. Step 5: Solve for x
    x = 4,698,616,314.11/78,942.88
  6. Step 6: Final answer
    x = 59,519.19

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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.