Home / 138,187.09-206,948.46-78,842.85

Finding the Fourth Proportional to 138,187.09, 206,948.46 and 78,842.85

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Solution

The fourth proportional to 138,187.09, 206,948.46 and 78,842.85 is: 118,074.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,187.09 : 206,948.46 = 78,842.85 : x
  2. Step 2: Convert to fraction form
    138,187.09/206,948.46 = 78,842.85/x
  3. Step 3: Cross multiply
    138,187.09x = 206,948.46 × 78,842.85
  4. Step 4: Simplify right side
    138,187.09x = 16,316,406,389.51
  5. Step 5: Solve for x
    x = 16,316,406,389.51/138,187.09
  6. Step 6: Final answer
    x = 118,074.75

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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.