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Finding the Fourth Proportional to 53,638.62, 74,017.71 and 30,975.90

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Solution

The fourth proportional to 53,638.62, 74,017.71 and 30,975.90 is: 42,744.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,638.62 : 74,017.71 = 30,975.90 : x
  2. Step 2: Convert to fraction form
    53,638.62/74,017.71 = 30,975.90/x
  3. Step 3: Cross multiply
    53,638.62x = 74,017.71 × 30,975.90
  4. Step 4: Simplify right side
    53,638.62x = 2,292,765,183.19
  5. Step 5: Solve for x
    x = 2,292,765,183.19/53,638.62
  6. Step 6: Final answer
    x = 42,744.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.