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Finding the Fourth Proportional to 65,891.40, 90,930.20 and 35,676.72

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Solution

The fourth proportional to 65,891.40, 90,930.20 and 35,676.72 is: 49,233.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,891.40 : 90,930.20 = 35,676.72 : x
  2. Step 2: Convert to fraction form
    65,891.40/90,930.20 = 35,676.72/x
  3. Step 3: Cross multiply
    65,891.40x = 90,930.20 × 35,676.72
  4. Step 4: Simplify right side
    65,891.40x = 3,244,091,284.94
  5. Step 5: Solve for x
    x = 3,244,091,284.94/65,891.40
  6. Step 6: Final answer
    x = 49,233.91

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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.