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Finding the Fourth Proportional to 78,799.70, 118,158.48 and 28,179.21

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Solution

The fourth proportional to 78,799.70, 118,158.48 and 28,179.21 is: 42,254.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,799.70 : 118,158.48 = 28,179.21 : x
  2. Step 2: Convert to fraction form
    78,799.70/118,158.48 = 28,179.21/x
  3. Step 3: Cross multiply
    78,799.70x = 118,158.48 × 28,179.21
  4. Step 4: Simplify right side
    78,799.70x = 3,329,612,399.65
  5. Step 5: Solve for x
    x = 3,329,612,399.65/78,799.70
  6. Step 6: Final answer
    x = 42,254.12

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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.