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Finding the Fourth Proportional to 61,126.40, 91,835.40 and 54,711.20

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Solution

The fourth proportional to 61,126.40, 91,835.40 and 54,711.20 is: 82,197.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,126.40 : 91,835.40 = 54,711.20 : x
  2. Step 2: Convert to fraction form
    61,126.40/91,835.40 = 54,711.20/x
  3. Step 3: Cross multiply
    61,126.40x = 91,835.40 × 54,711.20
  4. Step 4: Simplify right side
    61,126.40x = 5,024,424,936.48
  5. Step 5: Solve for x
    x = 5,024,424,936.48/61,126.40
  6. Step 6: Final answer
    x = 82,197.30

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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.