Home / 126,241.90-189,107.70-78,711.10

Finding the Fourth Proportional to 126,241.90, 189,107.70 and 78,711.10

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Solution

The fourth proportional to 126,241.90, 189,107.70 and 78,711.10 is: 117,907.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,241.90 : 189,107.70 = 78,711.10 : x
  2. Step 2: Convert to fraction form
    126,241.90/189,107.70 = 78,711.10/x
  3. Step 3: Cross multiply
    126,241.90x = 189,107.70 × 78,711.10
  4. Step 4: Simplify right side
    126,241.90x = 14,884,875,085.47
  5. Step 5: Solve for x
    x = 14,884,875,085.47/126,241.90
  6. Step 6: Final answer
    x = 117,907.57

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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.