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Finding the Fourth Proportional to 122,362.65, 168,803.14 and 79,355.75

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Solution

The fourth proportional to 122,362.65, 168,803.14 and 79,355.75 is: 109,473.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,362.65 : 168,803.14 = 79,355.75 : x
  2. Step 2: Convert to fraction form
    122,362.65/168,803.14 = 79,355.75/x
  3. Step 3: Cross multiply
    122,362.65x = 168,803.14 × 79,355.75
  4. Step 4: Simplify right side
    122,362.65x = 13,395,499,832.96
  5. Step 5: Solve for x
    x = 13,395,499,832.96/122,362.65
  6. Step 6: Final answer
    x = 109,473.76

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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.