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Finding the Fourth Proportional to 72,523.84, 108,756.48 and 28,127.20

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Solution

The fourth proportional to 72,523.84, 108,756.48 and 28,127.20 is: 42,179.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,523.84 : 108,756.48 = 28,127.20 : x
  2. Step 2: Convert to fraction form
    72,523.84/108,756.48 = 28,127.20/x
  3. Step 3: Cross multiply
    72,523.84x = 108,756.48 × 28,127.20
  4. Step 4: Simplify right side
    72,523.84x = 3,059,015,264.26
  5. Step 5: Solve for x
    x = 3,059,015,264.26/72,523.84
  6. Step 6: Final answer
    x = 42,179.44

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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.