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Finding the Fourth Proportional to 72,574.99, 108,869.37 and 28,205.17

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Solution

The fourth proportional to 72,574.99, 108,869.37 and 28,205.17 is: 42,310.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,574.99 : 108,869.37 = 28,205.17 : x
  2. Step 2: Convert to fraction form
    72,574.99/108,869.37 = 28,205.17/x
  3. Step 3: Cross multiply
    72,574.99x = 108,869.37 × 28,205.17
  4. Step 4: Simplify right side
    72,574.99x = 3,070,679,088.64
  5. Step 5: Solve for x
    x = 3,070,679,088.64/72,574.99
  6. Step 6: Final answer
    x = 42,310.43

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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.