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Finding the Fourth Proportional to 74,916.40, 112,378.92 and 28,169.68

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Solution

The fourth proportional to 74,916.40, 112,378.92 and 28,169.68 is: 42,256.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,916.40 : 112,378.92 = 28,169.68 : x
  2. Step 2: Convert to fraction form
    74,916.40/112,378.92 = 28,169.68/x
  3. Step 3: Cross multiply
    74,916.40x = 112,378.92 × 28,169.68
  4. Step 4: Simplify right side
    74,916.40x = 3,165,678,215.15
  5. Step 5: Solve for x
    x = 3,165,678,215.15/74,916.40
  6. Step 6: Final answer
    x = 42,256.14

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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.