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Finding the Fourth Proportional to 63,689.10, 87,891 and 35,394.78

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Solution

The fourth proportional to 63,689.10, 87,891 and 35,394.78 is: 48,844.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,689.10 : 87,891 = 35,394.78 : x
  2. Step 2: Convert to fraction form
    63,689.10/87,891 = 35,394.78/x
  3. Step 3: Cross multiply
    63,689.10x = 87,891 × 35,394.78
  4. Step 4: Simplify right side
    63,689.10x = 3,110,882,608.98
  5. Step 5: Solve for x
    x = 3,110,882,608.98/63,689.10
  6. Step 6: Final answer
    x = 48,844.82

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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.