Home / 126,069.90-188,849.70-78,539.10

Finding the Fourth Proportional to 126,069.90, 188,849.70 and 78,539.10

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Solution

The fourth proportional to 126,069.90, 188,849.70 and 78,539.10 is: 117,649.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,069.90 : 188,849.70 = 78,539.10 : x
  2. Step 2: Convert to fraction form
    126,069.90/188,849.70 = 78,539.10/x
  3. Step 3: Cross multiply
    126,069.90x = 188,849.70 × 78,539.10
  4. Step 4: Simplify right side
    126,069.90x = 14,832,085,473.27
  5. Step 5: Solve for x
    x = 14,832,085,473.27/126,069.90
  6. Step 6: Final answer
    x = 117,649.70

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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.