Home / 137,048.20-205,572.30-77,999.20

Finding the Fourth Proportional to 137,048.20, 205,572.30 and 77,999.20

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Solution

The fourth proportional to 137,048.20, 205,572.30 and 77,999.20 is: 116,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,048.20 : 205,572.30 = 77,999.20 : x
  2. Step 2: Convert to fraction form
    137,048.20/205,572.30 = 77,999.20/x
  3. Step 3: Cross multiply
    137,048.20x = 205,572.30 × 77,999.20
  4. Step 4: Simplify right side
    137,048.20x = 16,034,474,942.16
  5. Step 5: Solve for x
    x = 16,034,474,942.16/137,048.20
  6. Step 6: Final answer
    x = 116,998.80

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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.