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Finding the Fourth Proportional to 78,943.68, 108,891.36 and 47,088

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Solution

The fourth proportional to 78,943.68, 108,891.36 and 47,088 is: 64,951.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,943.68 : 108,891.36 = 47,088 : x
  2. Step 2: Convert to fraction form
    78,943.68/108,891.36 = 47,088/x
  3. Step 3: Cross multiply
    78,943.68x = 108,891.36 × 47,088
  4. Step 4: Simplify right side
    78,943.68x = 5,127,476,359.68
  5. Step 5: Solve for x
    x = 5,127,476,359.68/78,943.68
  6. Step 6: Final answer
    x = 64,951.07

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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.