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Finding the Fourth Proportional to 74,488.50, 102,710.61 and 69,764.58

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Solution

The fourth proportional to 74,488.50, 102,710.61 and 69,764.58 is: 96,196.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,488.50 : 102,710.61 = 69,764.58 : x
  2. Step 2: Convert to fraction form
    74,488.50/102,710.61 = 69,764.58/x
  3. Step 3: Cross multiply
    74,488.50x = 102,710.61 × 69,764.58
  4. Step 4: Simplify right side
    74,488.50x = 7,165,562,568.19
  5. Step 5: Solve for x
    x = 7,165,562,568.19/74,488.50
  6. Step 6: Final answer
    x = 96,196.90

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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.