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Finding the Fourth Proportional to 220,967.60, 331,451.40 and 136,986.80

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Solution

The fourth proportional to 220,967.60, 331,451.40 and 136,986.80 is: 205,480.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,967.60 : 331,451.40 = 136,986.80 : x
  2. Step 2: Convert to fraction form
    220,967.60/331,451.40 = 136,986.80/x
  3. Step 3: Cross multiply
    220,967.60x = 331,451.40 × 136,986.80
  4. Step 4: Simplify right side
    220,967.60x = 45,404,466,641.52
  5. Step 5: Solve for x
    x = 45,404,466,641.52/220,967.60
  6. Step 6: Final answer
    x = 205,480.20

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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.