Home / 138,184.90-206,945.18-78,840.65

Finding the Fourth Proportional to 138,184.90, 206,945.18 and 78,840.65

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Solution

The fourth proportional to 138,184.90, 206,945.18 and 78,840.65 is: 118,071.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,184.90 : 206,945.18 = 78,840.65 : x
  2. Step 2: Convert to fraction form
    138,184.90/206,945.18 = 78,840.65/x
  3. Step 3: Cross multiply
    138,184.90x = 206,945.18 × 78,840.65
  4. Step 4: Simplify right side
    138,184.90x = 16,315,692,505.57
  5. Step 5: Solve for x
    x = 16,315,692,505.57/138,184.90
  6. Step 6: Final answer
    x = 118,071.46

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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.