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Finding the Fourth Proportional to 78,950.37, 108,959.13 and 43,145.81

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Solution

The fourth proportional to 78,950.37, 108,959.13 and 43,145.81 is: 59,545.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,950.37 : 108,959.13 = 43,145.81 : x
  2. Step 2: Convert to fraction form
    78,950.37/108,959.13 = 43,145.81/x
  3. Step 3: Cross multiply
    78,950.37x = 108,959.13 × 43,145.81
  4. Step 4: Simplify right side
    78,950.37x = 4,701,129,375.95
  5. Step 5: Solve for x
    x = 4,701,129,375.95/78,950.37
  6. Step 6: Final answer
    x = 59,545.37

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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.