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Finding the Fourth Proportional to 72,352.34, 108,528.55 and 30,209.45

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Solution

The fourth proportional to 72,352.34, 108,528.55 and 30,209.45 is: 45,314.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,352.34 : 108,528.55 = 30,209.45 : x
  2. Step 2: Convert to fraction form
    72,352.34/108,528.55 = 30,209.45/x
  3. Step 3: Cross multiply
    72,352.34x = 108,528.55 × 30,209.45
  4. Step 4: Simplify right side
    72,352.34x = 3,278,588,000.60
  5. Step 5: Solve for x
    x = 3,278,588,000.60/72,352.34
  6. Step 6: Final answer
    x = 45,314.20

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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.