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Finding the Fourth Proportional to 63,920.80, 88,231.44 and 42,704.80

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Solution

The fourth proportional to 63,920.80, 88,231.44 and 42,704.80 is: 58,946.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,920.80 : 88,231.44 = 42,704.80 : x
  2. Step 2: Convert to fraction form
    63,920.80/88,231.44 = 42,704.80/x
  3. Step 3: Cross multiply
    63,920.80x = 88,231.44 × 42,704.80
  4. Step 4: Simplify right side
    63,920.80x = 3,767,905,998.91
  5. Step 5: Solve for x
    x = 3,767,905,998.91/63,920.80
  6. Step 6: Final answer
    x = 58,946.48

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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.