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Finding the Fourth Proportional to 75,322.72, 112,916.94 and 28,608.40

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Solution

The fourth proportional to 75,322.72, 112,916.94 and 28,608.40 is: 42,887.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,322.72 : 112,916.94 = 28,608.40 : x
  2. Step 2: Convert to fraction form
    75,322.72/112,916.94 = 28,608.40/x
  3. Step 3: Cross multiply
    75,322.72x = 112,916.94 × 28,608.40
  4. Step 4: Simplify right side
    75,322.72x = 3,230,372,986.30
  5. Step 5: Solve for x
    x = 3,230,372,986.30/75,322.72
  6. Step 6: Final answer
    x = 42,887.10

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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.