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Finding the Fourth Proportional to 42,750.93, 64,115.41 and 20,239.41

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Solution

The fourth proportional to 42,750.93, 64,115.41 and 20,239.41 is: 30,353.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,750.93 : 64,115.41 = 20,239.41 : x
  2. Step 2: Convert to fraction form
    42,750.93/64,115.41 = 20,239.41/x
  3. Step 3: Cross multiply
    42,750.93x = 64,115.41 × 20,239.41
  4. Step 4: Simplify right side
    42,750.93x = 1,297,658,070.31
  5. Step 5: Solve for x
    x = 1,297,658,070.31/42,750.93
  6. Step 6: Final answer
    x = 30,353.91

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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.