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Finding the Fourth Proportional to 72,574.48, 108,868.61 and 28,204.66

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Solution

The fourth proportional to 72,574.48, 108,868.61 and 28,204.66 is: 42,309.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,574.48 : 108,868.61 = 28,204.66 : x
  2. Step 2: Convert to fraction form
    72,574.48/108,868.61 = 28,204.66/x
  3. Step 3: Cross multiply
    72,574.48x = 108,868.61 × 28,204.66
  4. Step 4: Simplify right side
    72,574.48x = 3,070,601,988.70
  5. Step 5: Solve for x
    x = 3,070,601,988.70/72,574.48
  6. Step 6: Final answer
    x = 42,309.67

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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.