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Finding the Fourth Proportional to 57,909.78, 86,836.89 and 28,292.94

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Solution

The fourth proportional to 57,909.78, 86,836.89 and 28,292.94 is: 42,425.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,909.78 : 86,836.89 = 28,292.94 : x
  2. Step 2: Convert to fraction form
    57,909.78/86,836.89 = 28,292.94/x
  3. Step 3: Cross multiply
    57,909.78x = 86,836.89 × 28,292.94
  4. Step 4: Simplify right side
    57,909.78x = 2,456,870,918.56
  5. Step 5: Solve for x
    x = 2,456,870,918.56/57,909.78
  6. Step 6: Final answer
    x = 42,425.84

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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.