Home / 272,579.10-408,885.05-85,590.60

Finding the Fourth Proportional to 272,579.10, 408,885.05 and 85,590.60

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Solution

The fourth proportional to 272,579.10, 408,885.05 and 85,590.60 is: 128,391.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,579.10 : 408,885.05 = 85,590.60 : x
  2. Step 2: Convert to fraction form
    272,579.10/408,885.05 = 85,590.60/x
  3. Step 3: Cross multiply
    272,579.10x = 408,885.05 × 85,590.60
  4. Step 4: Simplify right side
    272,579.10x = 34,996,716,760.53
  5. Step 5: Solve for x
    x = 34,996,716,760.53/272,579.10
  6. Step 6: Final answer
    x = 128,391.05

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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.