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Finding the Fourth Proportional to 57,097.20, 78,812.04 and 39,217.20

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Solution

The fourth proportional to 57,097.20, 78,812.04 and 39,217.20 is: 54,132.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,097.20 : 78,812.04 = 39,217.20 : x
  2. Step 2: Convert to fraction form
    57,097.20/78,812.04 = 39,217.20/x
  3. Step 3: Cross multiply
    57,097.20x = 78,812.04 × 39,217.20
  4. Step 4: Simplify right side
    57,097.20x = 3,090,787,535.09
  5. Step 5: Solve for x
    x = 3,090,787,535.09/57,097.20
  6. Step 6: Final answer
    x = 54,132.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.