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Finding the Fourth Proportional to 125,362.80, 188,211.06 and 72,810

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Solution

The fourth proportional to 125,362.80, 188,211.06 and 72,810 is: 109,311.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,362.80 : 188,211.06 = 72,810 : x
  2. Step 2: Convert to fraction form
    125,362.80/188,211.06 = 72,810/x
  3. Step 3: Cross multiply
    125,362.80x = 188,211.06 × 72,810
  4. Step 4: Simplify right side
    125,362.80x = 13,703,647,278.60
  5. Step 5: Solve for x
    x = 13,703,647,278.60/125,362.80
  6. Step 6: Final answer
    x = 109,311.91

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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.