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Finding the Fourth Proportional to 65,765.79, 90,757.67 and 38,907.61

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Solution

The fourth proportional to 65,765.79, 90,757.67 and 38,907.61 is: 53,693.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,765.79 : 90,757.67 = 38,907.61 : x
  2. Step 2: Convert to fraction form
    65,765.79/90,757.67 = 38,907.61/x
  3. Step 3: Cross multiply
    65,765.79x = 90,757.67 × 38,907.61
  4. Step 4: Simplify right side
    65,765.79x = 3,531,163,607.44
  5. Step 5: Solve for x
    x = 3,531,163,607.44/65,765.79
  6. Step 6: Final answer
    x = 53,693.02

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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.