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Finding the Fourth Proportional to 72,345.96, 108,532.08 and 30,205.08

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Solution

The fourth proportional to 72,345.96, 108,532.08 and 30,205.08 is: 45,313.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,345.96 : 108,532.08 = 30,205.08 : x
  2. Step 2: Convert to fraction form
    72,345.96/108,532.08 = 30,205.08/x
  3. Step 3: Cross multiply
    72,345.96x = 108,532.08 × 30,205.08
  4. Step 4: Simplify right side
    72,345.96x = 3,278,220,158.97
  5. Step 5: Solve for x
    x = 3,278,220,158.97/72,345.96
  6. Step 6: Final answer
    x = 45,313.11

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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.