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Finding the Fourth Proportional to 128,494.88, 191,801.24 and 113,344.80

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Solution

The fourth proportional to 128,494.88, 191,801.24 and 113,344.80 is: 169,187.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,494.88 : 191,801.24 = 113,344.80 : x
  2. Step 2: Convert to fraction form
    128,494.88/191,801.24 = 113,344.80/x
  3. Step 3: Cross multiply
    128,494.88x = 191,801.24 × 113,344.80
  4. Step 4: Simplify right side
    128,494.88x = 21,739,673,187.55
  5. Step 5: Solve for x
    x = 21,739,673,187.55/128,494.88
  6. Step 6: Final answer
    x = 169,187.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.