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Finding the Fourth Proportional to 74,242.32, 111,354.54 and 20,938.32

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Solution

The fourth proportional to 74,242.32, 111,354.54 and 20,938.32 is: 31,404.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,242.32 : 111,354.54 = 20,938.32 : x
  2. Step 2: Convert to fraction form
    74,242.32/111,354.54 = 20,938.32/x
  3. Step 3: Cross multiply
    74,242.32x = 111,354.54 × 20,938.32
  4. Step 4: Simplify right side
    74,242.32x = 2,331,576,991.97
  5. Step 5: Solve for x
    x = 2,331,576,991.97/74,242.32
  6. Step 6: Final answer
    x = 31,404.96

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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.