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Finding the Fourth Proportional to 57,661.87, 79,455.28 and 42,530.56

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Solution

The fourth proportional to 57,661.87, 79,455.28 and 42,530.56 is: 58,605.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,661.87 : 79,455.28 = 42,530.56 : x
  2. Step 2: Convert to fraction form
    57,661.87/79,455.28 = 42,530.56/x
  3. Step 3: Cross multiply
    57,661.87x = 79,455.28 × 42,530.56
  4. Step 4: Simplify right side
    57,661.87x = 3,379,277,248.39
  5. Step 5: Solve for x
    x = 3,379,277,248.39/57,661.87
  6. Step 6: Final answer
    x = 58,605.06

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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.