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Finding the Fourth Proportional to 63,698.40, 87,903.36 and 35,405.76

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Solution

The fourth proportional to 63,698.40, 87,903.36 and 35,405.76 is: 48,859.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,698.40 : 87,903.36 = 35,405.76 : x
  2. Step 2: Convert to fraction form
    63,698.40/87,903.36 = 35,405.76/x
  3. Step 3: Cross multiply
    63,698.40x = 87,903.36 × 35,405.76
  4. Step 4: Simplify right side
    63,698.40x = 3,112,285,267.35
  5. Step 5: Solve for x
    x = 3,112,285,267.35/63,698.40
  6. Step 6: Final answer
    x = 48,859.71

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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.