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Finding the Fourth Proportional to 57,772.80, 79,763.52 and 47,187.84

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Solution

The fourth proportional to 57,772.80, 79,763.52 and 47,187.84 is: 65,149.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,772.80 : 79,763.52 = 47,187.84 : x
  2. Step 2: Convert to fraction form
    57,772.80/79,763.52 = 47,187.84/x
  3. Step 3: Cross multiply
    57,772.80x = 79,763.52 × 47,187.84
  4. Step 4: Simplify right side
    57,772.80x = 3,763,868,219.60
  5. Step 5: Solve for x
    x = 3,763,868,219.60/57,772.80
  6. Step 6: Final answer
    x = 65,149.49

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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.