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Finding the Fourth Proportional to 78,866.52, 118,254.30 and 53,936.79

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Solution

The fourth proportional to 78,866.52, 118,254.30 and 53,936.79 is: 80,874.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,866.52 : 118,254.30 = 53,936.79 : x
  2. Step 2: Convert to fraction form
    78,866.52/118,254.30 = 53,936.79/x
  3. Step 3: Cross multiply
    78,866.52x = 118,254.30 × 53,936.79
  4. Step 4: Simplify right side
    78,866.52x = 6,378,257,345.70
  5. Step 5: Solve for x
    x = 6,378,257,345.70/78,866.52
  6. Step 6: Final answer
    x = 80,874.08

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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.