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Finding the Fourth Proportional to 57,758.40, 86,637.60 and 53,287.20

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Solution

The fourth proportional to 57,758.40, 86,637.60 and 53,287.20 is: 79,930.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,758.40 : 86,637.60 = 53,287.20 : x
  2. Step 2: Convert to fraction form
    57,758.40/86,637.60 = 53,287.20/x
  3. Step 3: Cross multiply
    57,758.40x = 86,637.60 × 53,287.20
  4. Step 4: Simplify right side
    57,758.40x = 4,616,675,118.72
  5. Step 5: Solve for x
    x = 4,616,675,118.72/57,758.40
  6. Step 6: Final answer
    x = 79,930.80

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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.