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Finding the Fourth Proportional to 122,213.14, 168,338.66 and 86,340.87

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Solution

The fourth proportional to 122,213.14, 168,338.66 and 86,340.87 is: 118,927.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,213.14 : 168,338.66 = 86,340.87 : x
  2. Step 2: Convert to fraction form
    122,213.14/168,338.66 = 86,340.87/x
  3. Step 3: Cross multiply
    122,213.14x = 168,338.66 × 86,340.87
  4. Step 4: Simplify right side
    122,213.14x = 14,534,505,927.33
  5. Step 5: Solve for x
    x = 14,534,505,927.33/122,213.14
  6. Step 6: Final answer
    x = 118,927.52

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1.5x scale

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.