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Finding the Fourth Proportional to 112,375.70, 168,563.55 and 72,458.90

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Solution

The fourth proportional to 112,375.70, 168,563.55 and 72,458.90 is: 108,688.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,375.70 : 168,563.55 = 72,458.90 : x
  2. Step 2: Convert to fraction form
    112,375.70/168,563.55 = 72,458.90/x
  3. Step 3: Cross multiply
    112,375.70x = 168,563.55 × 72,458.90
  4. Step 4: Simplify right side
    112,375.70x = 12,213,929,413.10
  5. Step 5: Solve for x
    x = 12,213,929,413.10/112,375.70
  6. Step 6: Final answer
    x = 108,688.35

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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.