Home / 126,279.40-189,188.70-102,778.60

Finding the Fourth Proportional to 126,279.40, 189,188.70 and 102,778.60

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Solution

The fourth proportional to 126,279.40, 189,188.70 and 102,778.60 is: 153,980.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,279.40 : 189,188.70 = 102,778.60 : x
  2. Step 2: Convert to fraction form
    126,279.40/189,188.70 = 102,778.60/x
  3. Step 3: Cross multiply
    126,279.40x = 189,188.70 × 102,778.60
  4. Step 4: Simplify right side
    126,279.40x = 19,444,549,721.82
  5. Step 5: Solve for x
    x = 19,444,549,721.82/126,279.40
  6. Step 6: Final answer
    x = 153,980.38

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1.5x scale

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.