Home / 72,436.20-108,648.90-30,305.40

Finding the Fourth Proportional to 72,436.20, 108,648.90 and 30,305.40

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Solution

The fourth proportional to 72,436.20, 108,648.90 and 30,305.40 is: 45,455.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,436.20 : 108,648.90 = 30,305.40 : x
  2. Step 2: Convert to fraction form
    72,436.20/108,648.90 = 30,305.40/x
  3. Step 3: Cross multiply
    72,436.20x = 108,648.90 × 30,305.40
  4. Step 4: Simplify right side
    72,436.20x = 3,292,648,374.06
  5. Step 5: Solve for x
    x = 3,292,648,374.06/72,436.20
  6. Step 6: Final answer
    x = 45,455.84

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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.