Home / 126,039.20-189,058.80-81,424.40

Finding the Fourth Proportional to 126,039.20, 189,058.80 and 81,424.40

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Solution

The fourth proportional to 126,039.20, 189,058.80 and 81,424.40 is: 122,136.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,039.20 : 189,058.80 = 81,424.40 : x
  2. Step 2: Convert to fraction form
    126,039.20/189,058.80 = 81,424.40/x
  3. Step 3: Cross multiply
    126,039.20x = 189,058.80 × 81,424.40
  4. Step 4: Simplify right side
    126,039.20x = 15,393,999,354.72
  5. Step 5: Solve for x
    x = 15,393,999,354.72/126,039.20
  6. Step 6: Final answer
    x = 122,136.60

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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.