Home / 65,635.72-90,557.70-38,780.68

Finding the Fourth Proportional to 65,635.72, 90,557.70 and 38,780.68

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Solution

The fourth proportional to 65,635.72, 90,557.70 and 38,780.68 is: 53,505.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,635.72 : 90,557.70 = 38,780.68 : x
  2. Step 2: Convert to fraction form
    65,635.72/90,557.70 = 38,780.68/x
  3. Step 3: Cross multiply
    65,635.72x = 90,557.70 × 38,780.68
  4. Step 4: Simplify right side
    65,635.72x = 3,511,889,185.24
  5. Step 5: Solve for x
    x = 3,511,889,185.24/65,635.72
  6. Step 6: Final answer
    x = 53,505.76

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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.