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Finding the Fourth Proportional to 74,916.65, 112,379.31 and 28,169.93

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Solution

The fourth proportional to 74,916.65, 112,379.31 and 28,169.93 is: 42,256.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,916.65 : 112,379.31 = 28,169.93 : x
  2. Step 2: Convert to fraction form
    74,916.65/112,379.31 = 28,169.93/x
  3. Step 3: Cross multiply
    74,916.65x = 112,379.31 × 28,169.93
  4. Step 4: Simplify right side
    74,916.65x = 3,165,717,577.10
  5. Step 5: Solve for x
    x = 3,165,717,577.10/74,916.65
  6. Step 6: Final answer
    x = 42,256.53

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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.