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Finding the Fourth Proportional to 189,637.20, 261,856.80 and 126,262.80

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Solution

The fourth proportional to 189,637.20, 261,856.80 and 126,262.80 is: 174,347.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,637.20 : 261,856.80 = 126,262.80 : x
  2. Step 2: Convert to fraction form
    189,637.20/261,856.80 = 126,262.80/x
  3. Step 3: Cross multiply
    189,637.20x = 261,856.80 × 126,262.80
  4. Step 4: Simplify right side
    189,637.20x = 33,062,772,767.04
  5. Step 5: Solve for x
    x = 33,062,772,767.04/189,637.20
  6. Step 6: Final answer
    x = 174,347.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.