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Finding the Fourth Proportional to 74,053.47, 111,063.05 and 20,749.20

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Solution

The fourth proportional to 74,053.47, 111,063.05 and 20,749.20 is: 31,118.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,053.47 : 111,063.05 = 20,749.20 : x
  2. Step 2: Convert to fraction form
    74,053.47/111,063.05 = 20,749.20/x
  3. Step 3: Cross multiply
    74,053.47x = 111,063.05 × 20,749.20
  4. Step 4: Simplify right side
    74,053.47x = 2,304,468,994.64
  5. Step 5: Solve for x
    x = 2,304,468,994.64/74,053.47
  6. Step 6: Final answer
    x = 31,118.99

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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.