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Finding the Fourth Proportional to 123,090, 169,779.84 and 75,366.92

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Solution

The fourth proportional to 123,090, 169,779.84 and 75,366.92 is: 103,954.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,090 : 169,779.84 = 75,366.92 : x
  2. Step 2: Convert to fraction form
    123,090/169,779.84 = 75,366.92/x
  3. Step 3: Cross multiply
    123,090x = 169,779.84 × 75,366.92
  4. Step 4: Simplify right side
    123,090x = 12,795,782,769.99
  5. Step 5: Solve for x
    x = 12,795,782,769.99/123,090
  6. Step 6: Final answer
    x = 103,954.69

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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.