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Finding the Fourth Proportional to 80,011, 120,089.28 and 42,602.44

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Solution

The fourth proportional to 80,011, 120,089.28 and 42,602.44 is: 63,942.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,011 : 120,089.28 = 42,602.44 : x
  2. Step 2: Convert to fraction form
    80,011/120,089.28 = 42,602.44/x
  3. Step 3: Cross multiply
    80,011x = 120,089.28 × 42,602.44
  4. Step 4: Simplify right side
    80,011x = 5,116,096,345.84
  5. Step 5: Solve for x
    x = 5,116,096,345.84/80,011
  6. Step 6: Final answer
    x = 63,942.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.