Home / 126,378.38-189,554.30-42,129.47

Finding the Fourth Proportional to 126,378.38, 189,554.30 and 42,129.47

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Solution

The fourth proportional to 126,378.38, 189,554.30 and 42,129.47 is: 63,189.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,378.38 : 189,554.30 = 42,129.47 : x
  2. Step 2: Convert to fraction form
    126,378.38/189,554.30 = 42,129.47/x
  3. Step 3: Cross multiply
    126,378.38x = 189,554.30 × 42,129.47
  4. Step 4: Simplify right side
    126,378.38x = 7,985,821,036.80
  5. Step 5: Solve for x
    x = 7,985,821,036.80/126,378.38
  6. Step 6: Final answer
    x = 63,189.77

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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.