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Finding the Fourth Proportional to 138,441.88, 191,123.24 and 110,918.48

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Solution

The fourth proportional to 138,441.88, 191,123.24 and 110,918.48 is: 153,126.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,441.88 : 191,123.24 = 110,918.48 : x
  2. Step 2: Convert to fraction form
    138,441.88/191,123.24 = 110,918.48/x
  3. Step 3: Cross multiply
    138,441.88x = 191,123.24 × 110,918.48
  4. Step 4: Simplify right side
    138,441.88x = 21,199,099,273.48
  5. Step 5: Solve for x
    x = 21,199,099,273.48/138,441.88
  6. Step 6: Final answer
    x = 153,126.35

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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.