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Finding the Fourth Proportional to 61,178.40, 91,757.52 and 19,620

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Solution

The fourth proportional to 61,178.40, 91,757.52 and 19,620 is: 29,426.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,178.40 : 91,757.52 = 19,620 : x
  2. Step 2: Convert to fraction form
    61,178.40/91,757.52 = 19,620/x
  3. Step 3: Cross multiply
    61,178.40x = 91,757.52 × 19,620
  4. Step 4: Simplify right side
    61,178.40x = 1,800,282,542.40
  5. Step 5: Solve for x
    x = 1,800,282,542.40/61,178.40
  6. Step 6: Final answer
    x = 29,426.77

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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.