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Finding the Fourth Proportional to 57,812.60, 86,735.10 and 28,231.40

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Solution

The fourth proportional to 57,812.60, 86,735.10 and 28,231.40 is: 42,355.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,812.60 : 86,735.10 = 28,231.40 : x
  2. Step 2: Convert to fraction form
    57,812.60/86,735.10 = 28,231.40/x
  3. Step 3: Cross multiply
    57,812.60x = 86,735.10 × 28,231.40
  4. Step 4: Simplify right side
    57,812.60x = 2,448,653,302.14
  5. Step 5: Solve for x
    x = 2,448,653,302.14/57,812.60
  6. Step 6: Final answer
    x = 42,355.01

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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.