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Finding the Fourth Proportional to 74,235.78, 111,331.80 and 21,631.14

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Solution

The fourth proportional to 74,235.78, 111,331.80 and 21,631.14 is: 32,440.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,235.78 : 111,331.80 = 21,631.14 : x
  2. Step 2: Convert to fraction form
    74,235.78/111,331.80 = 21,631.14/x
  3. Step 3: Cross multiply
    74,235.78x = 111,331.80 × 21,631.14
  4. Step 4: Simplify right side
    74,235.78x = 2,408,233,752.25
  5. Step 5: Solve for x
    x = 2,408,233,752.25/74,235.78
  6. Step 6: Final answer
    x = 32,440.34

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1.5x scale

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.