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Finding the Fourth Proportional to 73,012.54, 109,564.88 and 28,638.11

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Solution

The fourth proportional to 73,012.54, 109,564.88 and 28,638.11 is: 42,975.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,012.54 : 109,564.88 = 28,638.11 : x
  2. Step 2: Convert to fraction form
    73,012.54/109,564.88 = 28,638.11/x
  3. Step 3: Cross multiply
    73,012.54x = 109,564.88 × 28,638.11
  4. Step 4: Simplify right side
    73,012.54x = 3,137,731,085.58
  5. Step 5: Solve for x
    x = 3,137,731,085.58/73,012.54
  6. Step 6: Final answer
    x = 42,975.24

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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.