Home / 136,489.38-188,333.18-79,117.50

Finding the Fourth Proportional to 136,489.38, 188,333.18 and 79,117.50

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Solution

The fourth proportional to 136,489.38, 188,333.18 and 79,117.50 is: 109,169.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,489.38 : 188,333.18 = 79,117.50 : x
  2. Step 2: Convert to fraction form
    136,489.38/188,333.18 = 79,117.50/x
  3. Step 3: Cross multiply
    136,489.38x = 188,333.18 × 79,117.50
  4. Step 4: Simplify right side
    136,489.38x = 14,900,450,368.65
  5. Step 5: Solve for x
    x = 14,900,450,368.65/136,489.38
  6. Step 6: Final answer
    x = 109,169.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.