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Finding the Fourth Proportional to 65,266.49, 90,037.35 and 38,391.90

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Solution

The fourth proportional to 65,266.49, 90,037.35 and 38,391.90 is: 52,962.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,266.49 : 90,037.35 = 38,391.90 : x
  2. Step 2: Convert to fraction form
    65,266.49/90,037.35 = 38,391.90/x
  3. Step 3: Cross multiply
    65,266.49x = 90,037.35 × 38,391.90
  4. Step 4: Simplify right side
    65,266.49x = 3,456,704,937.47
  5. Step 5: Solve for x
    x = 3,456,704,937.47/65,266.49
  6. Step 6: Final answer
    x = 52,962.94

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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.