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Finding the Fourth Proportional to 124,426.20, 186,201.90 and 86,809.80

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Solution

The fourth proportional to 124,426.20, 186,201.90 and 86,809.80 is: 129,909.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,426.20 : 186,201.90 = 86,809.80 : x
  2. Step 2: Convert to fraction form
    124,426.20/186,201.90 = 86,809.80/x
  3. Step 3: Cross multiply
    124,426.20x = 186,201.90 × 86,809.80
  4. Step 4: Simplify right side
    124,426.20x = 16,164,149,698.62
  5. Step 5: Solve for x
    x = 16,164,149,698.62/124,426.20
  6. Step 6: Final answer
    x = 129,909.53

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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.