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Finding the Fourth Proportional to 72,555.69, 108,812.86 and 28,172.95

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Solution

The fourth proportional to 72,555.69, 108,812.86 and 28,172.95 is: 42,251.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,555.69 : 108,812.86 = 28,172.95 : x
  2. Step 2: Convert to fraction form
    72,555.69/108,812.86 = 28,172.95/x
  3. Step 3: Cross multiply
    72,555.69x = 108,812.86 × 28,172.95
  4. Step 4: Simplify right side
    72,555.69x = 3,065,579,264.14
  5. Step 5: Solve for x
    x = 3,065,579,264.14/72,555.69
  6. Step 6: Final answer
    x = 42,251.40

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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.