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Finding the Fourth Proportional to 74,779.69, 103,137.64 and 47,924.71

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Solution

The fourth proportional to 74,779.69, 103,137.64 and 47,924.71 is: 66,098.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,779.69 : 103,137.64 = 47,924.71 : x
  2. Step 2: Convert to fraction form
    74,779.69/103,137.64 = 47,924.71/x
  3. Step 3: Cross multiply
    74,779.69x = 103,137.64 × 47,924.71
  4. Step 4: Simplify right side
    74,779.69x = 4,942,841,487.08
  5. Step 5: Solve for x
    x = 4,942,841,487.08/74,779.69
  6. Step 6: Final answer
    x = 66,098.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.