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Finding the Fourth Proportional to 74,034.68, 111,045.12 and 20,731.49

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Solution

The fourth proportional to 74,034.68, 111,045.12 and 20,731.49 is: 31,095.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,034.68 : 111,045.12 = 20,731.49 : x
  2. Step 2: Convert to fraction form
    74,034.68/111,045.12 = 20,731.49/x
  3. Step 3: Cross multiply
    74,034.68x = 111,045.12 × 20,731.49
  4. Step 4: Simplify right side
    74,034.68x = 2,302,130,239.60
  5. Step 5: Solve for x
    x = 2,302,130,239.60/74,034.68
  6. Step 6: Final answer
    x = 31,095.30

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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.