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Finding the Fourth Proportional to 78,950.19, 108,949.96 and 43,139.39

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Solution

The fourth proportional to 78,950.19, 108,949.96 and 43,139.39 is: 59,531.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,950.19 : 108,949.96 = 43,139.39 : x
  2. Step 2: Convert to fraction form
    78,950.19/108,949.96 = 43,139.39/x
  3. Step 3: Cross multiply
    78,950.19x = 108,949.96 × 43,139.39
  4. Step 4: Simplify right side
    78,950.19x = 4,700,034,324.10
  5. Step 5: Solve for x
    x = 4,700,034,324.10/78,950.19
  6. Step 6: Final answer
    x = 59,531.64

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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.