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Finding the Fourth Proportional to 122,811, 169,479.18 and 69,819

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Solution

The fourth proportional to 122,811, 169,479.18 and 69,819 is: 96,350.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,811 : 169,479.18 = 69,819 : x
  2. Step 2: Convert to fraction form
    122,811/169,479.18 = 69,819/x
  3. Step 3: Cross multiply
    122,811x = 169,479.18 × 69,819
  4. Step 4: Simplify right side
    122,811x = 11,832,866,868.42
  5. Step 5: Solve for x
    x = 11,832,866,868.42/122,811
  6. Step 6: Final answer
    x = 96,350.22

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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.