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Finding the Fourth Proportional to 57,640.78, 86,460.99 and 20,200.79

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Solution

The fourth proportional to 57,640.78, 86,460.99 and 20,200.79 is: 30,301.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,640.78 : 86,460.99 = 20,200.79 : x
  2. Step 2: Convert to fraction form
    57,640.78/86,460.99 = 20,200.79/x
  3. Step 3: Cross multiply
    57,640.78x = 86,460.99 × 20,200.79
  4. Step 4: Simplify right side
    57,640.78x = 1,746,580,339.46
  5. Step 5: Solve for x
    x = 1,746,580,339.46/57,640.78
  6. Step 6: Final answer
    x = 30,301.12

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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.