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Finding the Fourth Proportional to 72,606.35, 108,916.25 and 28,236.44

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Solution

The fourth proportional to 72,606.35, 108,916.25 and 28,236.44 is: 42,357.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,606.35 : 108,916.25 = 28,236.44 : x
  2. Step 2: Convert to fraction form
    72,606.35/108,916.25 = 28,236.44/x
  3. Step 3: Cross multiply
    72,606.35x = 108,916.25 × 28,236.44
  4. Step 4: Simplify right side
    72,606.35x = 3,075,406,472.39
  5. Step 5: Solve for x
    x = 3,075,406,472.39/72,606.35
  6. Step 6: Final answer
    x = 42,357.27

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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.