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Finding the Fourth Proportional to 125,501.76, 188,252.70 and 78,787.44

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Solution

The fourth proportional to 125,501.76, 188,252.70 and 78,787.44 is: 118,181.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,501.76 : 188,252.70 = 78,787.44 : x
  2. Step 2: Convert to fraction form
    125,501.76/188,252.70 = 78,787.44/x
  3. Step 3: Cross multiply
    125,501.76x = 188,252.70 × 78,787.44
  4. Step 4: Simplify right side
    125,501.76x = 14,831,948,306.09
  5. Step 5: Solve for x
    x = 14,831,948,306.09/125,501.76
  6. Step 6: Final answer
    x = 118,181.20

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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.