Home / 72,906.48-109,366.20-20,316.96

Finding the Fourth Proportional to 72,906.48, 109,366.20 and 20,316.96

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Solution

The fourth proportional to 72,906.48, 109,366.20 and 20,316.96 is: 30,477.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,906.48 : 109,366.20 = 20,316.96 : x
  2. Step 2: Convert to fraction form
    72,906.48/109,366.20 = 20,316.96/x
  3. Step 3: Cross multiply
    72,906.48x = 109,366.20 × 20,316.96
  4. Step 4: Simplify right side
    72,906.48x = 2,221,988,710.75
  5. Step 5: Solve for x
    x = 2,221,988,710.75/72,906.48
  6. Step 6: Final answer
    x = 30,477.25

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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.