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Finding the Fourth Proportional to 65,731.46, 90,676.77 and 38,860.88

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Solution

The fourth proportional to 65,731.46, 90,676.77 and 38,860.88 is: 53,608.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,731.46 : 90,676.77 = 38,860.88 : x
  2. Step 2: Convert to fraction form
    65,731.46/90,676.77 = 38,860.88/x
  3. Step 3: Cross multiply
    65,731.46x = 90,676.77 × 38,860.88
  4. Step 4: Simplify right side
    65,731.46x = 3,523,779,077.76
  5. Step 5: Solve for x
    x = 3,523,779,077.76/65,731.46
  6. Step 6: Final answer
    x = 53,608.71

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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.