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Finding the Fourth Proportional to 68,779.40, 103,402.38 and 54,916.52

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Solution

The fourth proportional to 68,779.40, 103,402.38 and 54,916.52 is: 82,561.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,779.40 : 103,402.38 = 54,916.52 : x
  2. Step 2: Convert to fraction form
    68,779.40/103,402.38 = 54,916.52/x
  3. Step 3: Cross multiply
    68,779.40x = 103,402.38 × 54,916.52
  4. Step 4: Simplify right side
    68,779.40x = 5,678,498,869.32
  5. Step 5: Solve for x
    x = 5,678,498,869.32/68,779.40
  6. Step 6: Final answer
    x = 82,561.04

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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.