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Finding the Fourth Proportional to 74,235, 111,358.98 and 18,831

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Solution

The fourth proportional to 74,235, 111,358.98 and 18,831 is: 28,248.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,235 : 111,358.98 = 18,831 : x
  2. Step 2: Convert to fraction form
    74,235/111,358.98 = 18,831/x
  3. Step 3: Cross multiply
    74,235x = 111,358.98 × 18,831
  4. Step 4: Simplify right side
    74,235x = 2,097,000,952.38
  5. Step 5: Solve for x
    x = 2,097,000,952.38/74,235
  6. Step 6: Final answer
    x = 28,248.14

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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.