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Finding the Fourth Proportional to 78,121.81, 117,025.98 and 35,943.13

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Solution

The fourth proportional to 78,121.81, 117,025.98 and 35,943.13 is: 53,842.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,121.81 : 117,025.98 = 35,943.13 : x
  2. Step 2: Convert to fraction form
    78,121.81/117,025.98 = 35,943.13/x
  3. Step 3: Cross multiply
    78,121.81x = 117,025.98 × 35,943.13
  4. Step 4: Simplify right side
    78,121.81x = 4,206,280,012.52
  5. Step 5: Solve for x
    x = 4,206,280,012.52/78,121.81
  6. Step 6: Final answer
    x = 53,842.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.