Home / 272,718.20-409,077.30-85,729.70

Finding the Fourth Proportional to 272,718.20, 409,077.30 and 85,729.70

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Solution

The fourth proportional to 272,718.20, 409,077.30 and 85,729.70 is: 128,594.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,718.20 : 409,077.30 = 85,729.70 : x
  2. Step 2: Convert to fraction form
    272,718.20/409,077.30 = 85,729.70/x
  3. Step 3: Cross multiply
    272,718.20x = 409,077.30 × 85,729.70
  4. Step 4: Simplify right side
    272,718.20x = 35,070,074,205.81
  5. Step 5: Solve for x
    x = 35,070,074,205.81/272,718.20
  6. Step 6: Final answer
    x = 128,594.55

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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.