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Finding the Fourth Proportional to 72,478.54, 108,628.57 and 34,547.76

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Solution

The fourth proportional to 72,478.54, 108,628.57 and 34,547.76 is: 51,779.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,478.54 : 108,628.57 = 34,547.76 : x
  2. Step 2: Convert to fraction form
    72,478.54/108,628.57 = 34,547.76/x
  3. Step 3: Cross multiply
    72,478.54x = 108,628.57 × 34,547.76
  4. Step 4: Simplify right side
    72,478.54x = 3,752,873,049.62
  5. Step 5: Solve for x
    x = 3,752,873,049.62/72,478.54
  6. Step 6: Final answer
    x = 51,779.10

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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.