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Finding the Fourth Proportional to 65,579.67, 90,479.43 and 38,731.68

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Solution

The fourth proportional to 65,579.67, 90,479.43 and 38,731.68 is: 53,437.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,579.67 : 90,479.43 = 38,731.68 : x
  2. Step 2: Convert to fraction form
    65,579.67/90,479.43 = 38,731.68/x
  3. Step 3: Cross multiply
    65,579.67x = 90,479.43 × 38,731.68
  4. Step 4: Simplify right side
    65,579.67x = 3,504,420,329.34
  5. Step 5: Solve for x
    x = 3,504,420,329.34/65,579.67
  6. Step 6: Final answer
    x = 53,437.60

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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.