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Finding the Fourth Proportional to 121,400.70, 167,529.69 and 70,410.21

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Solution

The fourth proportional to 121,400.70, 167,529.69 and 70,410.21 is: 97,164.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,400.70 : 167,529.69 = 70,410.21 : x
  2. Step 2: Convert to fraction form
    121,400.70/167,529.69 = 70,410.21/x
  3. Step 3: Cross multiply
    121,400.70x = 167,529.69 × 70,410.21
  4. Step 4: Simplify right side
    121,400.70x = 11,795,800,654.13
  5. Step 5: Solve for x
    x = 11,795,800,654.13/121,400.70
  6. Step 6: Final answer
    x = 97,164.19

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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.