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Finding the Fourth Proportional to 78,872.10, 118,308.15 and 49,323.30

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Solution

The fourth proportional to 78,872.10, 118,308.15 and 49,323.30 is: 73,984.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,872.10 : 118,308.15 = 49,323.30 : x
  2. Step 2: Convert to fraction form
    78,872.10/118,308.15 = 49,323.30/x
  3. Step 3: Cross multiply
    78,872.10x = 118,308.15 × 49,323.30
  4. Step 4: Simplify right side
    78,872.10x = 5,835,348,374.90
  5. Step 5: Solve for x
    x = 5,835,348,374.90/78,872.10
  6. Step 6: Final answer
    x = 73,984.95

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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.