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Finding the Fourth Proportional to 126,041.70, 189,062.55 and 90,612.30

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Solution

The fourth proportional to 126,041.70, 189,062.55 and 90,612.30 is: 135,918.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,041.70 : 189,062.55 = 90,612.30 : x
  2. Step 2: Convert to fraction form
    126,041.70/189,062.55 = 90,612.30/x
  3. Step 3: Cross multiply
    126,041.70x = 189,062.55 × 90,612.30
  4. Step 4: Simplify right side
    126,041.70x = 17,131,392,499.37
  5. Step 5: Solve for x
    x = 17,131,392,499.37/126,041.70
  6. Step 6: Final answer
    x = 135,918.45

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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.