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Finding the Fourth Proportional to 139,620.38, 209,368.44 and 39,757.91

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Solution

The fourth proportional to 139,620.38, 209,368.44 and 39,757.91 is: 59,619.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,620.38 : 209,368.44 = 39,757.91 : x
  2. Step 2: Convert to fraction form
    139,620.38/209,368.44 = 39,757.91/x
  3. Step 3: Cross multiply
    139,620.38x = 209,368.44 × 39,757.91
  4. Step 4: Simplify right side
    139,620.38x = 8,324,050,547.52
  5. Step 5: Solve for x
    x = 8,324,050,547.52/139,620.38
  6. Step 6: Final answer
    x = 59,619.17

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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.