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Finding the Fourth Proportional to 99,129.57, 148,694.57 and 69,679.19

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Solution

The fourth proportional to 99,129.57, 148,694.57 and 69,679.19 is: 104,518.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,129.57 : 148,694.57 = 69,679.19 : x
  2. Step 2: Convert to fraction form
    99,129.57/148,694.57 = 69,679.19/x
  3. Step 3: Cross multiply
    99,129.57x = 148,694.57 × 69,679.19
  4. Step 4: Simplify right side
    99,129.57x = 10,360,916,103.13
  5. Step 5: Solve for x
    x = 10,360,916,103.13/99,129.57
  6. Step 6: Final answer
    x = 104,518.93

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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.