Home / 285,640.20-428,461.83-85,959.23

Finding the Fourth Proportional to 285,640.20, 428,461.83 and 85,959.23

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Solution

The fourth proportional to 285,640.20, 428,461.83 and 85,959.23 is: 128,939.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,640.20 : 428,461.83 = 85,959.23 : x
  2. Step 2: Convert to fraction form
    285,640.20/428,461.83 = 85,959.23/x
  3. Step 3: Cross multiply
    285,640.20x = 428,461.83 × 85,959.23
  4. Step 4: Simplify right side
    285,640.20x = 36,830,246,607.12
  5. Step 5: Solve for x
    x = 36,830,246,607.12/285,640.20
  6. Step 6: Final answer
    x = 128,939.30

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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.