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Finding the Fourth Proportional to 77,251.90, 115,813.05 and 40,315.90

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Solution

The fourth proportional to 77,251.90, 115,813.05 and 40,315.90 is: 60,440.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,251.90 : 115,813.05 = 40,315.90 : x
  2. Step 2: Convert to fraction form
    77,251.90/115,813.05 = 40,315.90/x
  3. Step 3: Cross multiply
    77,251.90x = 115,813.05 × 40,315.90
  4. Step 4: Simplify right side
    77,251.90x = 4,669,107,342.50
  5. Step 5: Solve for x
    x = 4,669,107,342.50/77,251.90
  6. Step 6: Final answer
    x = 60,440.03

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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.