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Finding the Fourth Proportional to 158,439.63, 218,646.69 and 91,371.63

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Solution

The fourth proportional to 158,439.63, 218,646.69 and 91,371.63 is: 126,092.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,439.63 : 218,646.69 = 91,371.63 : x
  2. Step 2: Convert to fraction form
    158,439.63/218,646.69 = 91,371.63/x
  3. Step 3: Cross multiply
    158,439.63x = 218,646.69 × 91,371.63
  4. Step 4: Simplify right side
    158,439.63x = 19,978,104,459.40
  5. Step 5: Solve for x
    x = 19,978,104,459.40/158,439.63
  6. Step 6: Final answer
    x = 126,092.85

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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.