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Finding the Fourth Proportional to 139,770.28, 209,687.82 and 39,931.84

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Solution

The fourth proportional to 139,770.28, 209,687.82 and 39,931.84 is: 59,907.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,770.28 : 209,687.82 = 39,931.84 : x
  2. Step 2: Convert to fraction form
    139,770.28/209,687.82 = 39,931.84/x
  3. Step 3: Cross multiply
    139,770.28x = 209,687.82 × 39,931.84
  4. Step 4: Simplify right side
    139,770.28x = 8,373,220,478.19
  5. Step 5: Solve for x
    x = 8,373,220,478.19/139,770.28
  6. Step 6: Final answer
    x = 59,907.02

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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.