Home / 272,941.80-409,470.30-85,972.20

Finding the Fourth Proportional to 272,941.80, 409,470.30 and 85,972.20

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Solution

The fourth proportional to 272,941.80, 409,470.30 and 85,972.20 is: 128,976.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,941.80 : 409,470.30 = 85,972.20 : x
  2. Step 2: Convert to fraction form
    272,941.80/409,470.30 = 85,972.20/x
  3. Step 3: Cross multiply
    272,941.80x = 409,470.30 × 85,972.20
  4. Step 4: Simplify right side
    272,941.80x = 35,203,062,525.66
  5. Step 5: Solve for x
    x = 35,203,062,525.66/272,941.80
  6. Step 6: Final answer
    x = 128,976.44

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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.