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Finding the Fourth Proportional to 139,520.80, 209,281.20 and 44,750.80

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Solution

The fourth proportional to 139,520.80, 209,281.20 and 44,750.80 is: 67,126.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,520.80 : 209,281.20 = 44,750.80 : x
  2. Step 2: Convert to fraction form
    139,520.80/209,281.20 = 44,750.80/x
  3. Step 3: Cross multiply
    139,520.80x = 209,281.20 × 44,750.80
  4. Step 4: Simplify right side
    139,520.80x = 9,365,501,124.96
  5. Step 5: Solve for x
    x = 9,365,501,124.96/139,520.80
  6. Step 6: Final answer
    x = 67,126.20

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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.