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Finding the Fourth Proportional to 65,897.19, 90,936.15 and 37,218

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Solution

The fourth proportional to 65,897.19, 90,936.15 and 37,218 is: 51,359.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,897.19 : 90,936.15 = 37,218 : x
  2. Step 2: Convert to fraction form
    65,897.19/90,936.15 = 37,218/x
  3. Step 3: Cross multiply
    65,897.19x = 90,936.15 × 37,218
  4. Step 4: Simplify right side
    65,897.19x = 3,384,461,630.70
  5. Step 5: Solve for x
    x = 3,384,461,630.70/65,897.19
  6. Step 6: Final answer
    x = 51,359.73

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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.