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Finding the Fourth Proportional to 65,339.64, 90,156.78 and 38,486.52

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Solution

The fourth proportional to 65,339.64, 90,156.78 and 38,486.52 is: 53,104.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,339.64 : 90,156.78 = 38,486.52 : x
  2. Step 2: Convert to fraction form
    65,339.64/90,156.78 = 38,486.52/x
  3. Step 3: Cross multiply
    65,339.64x = 90,156.78 × 38,486.52
  4. Step 4: Simplify right side
    65,339.64x = 3,469,820,716.61
  5. Step 5: Solve for x
    x = 3,469,820,716.61/65,339.64
  6. Step 6: Final answer
    x = 53,104.37

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1.5x scale

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.