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Finding the Fourth Proportional to 63,690.40, 87,890.16 and 35,394.40

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Solution

The fourth proportional to 63,690.40, 87,890.16 and 35,394.40 is: 48,842.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,690.40 : 87,890.16 = 35,394.40 : x
  2. Step 2: Convert to fraction form
    63,690.40/87,890.16 = 35,394.40/x
  3. Step 3: Cross multiply
    63,690.40x = 87,890.16 × 35,394.40
  4. Step 4: Simplify right side
    63,690.40x = 3,110,819,479.10
  5. Step 5: Solve for x
    x = 3,110,819,479.10/63,690.40
  6. Step 6: Final answer
    x = 48,842.83

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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.