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Finding the Fourth Proportional to 78,850.30, 118,081.05 and 52,411.90

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Solution

The fourth proportional to 78,850.30, 118,081.05 and 52,411.90 is: 78,488.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,850.30 : 118,081.05 = 52,411.90 : x
  2. Step 2: Convert to fraction form
    78,850.30/118,081.05 = 52,411.90/x
  3. Step 3: Cross multiply
    78,850.30x = 118,081.05 × 52,411.90
  4. Step 4: Simplify right side
    78,850.30x = 6,188,852,184.50
  5. Step 5: Solve for x
    x = 6,188,852,184.50/78,850.30
  6. Step 6: Final answer
    x = 78,488.63

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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.