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Finding the Fourth Proportional to 138,342.96, 190,910.70 and 75,406.88

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Solution

The fourth proportional to 138,342.96, 190,910.70 and 75,406.88 is: 104,060.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,342.96 : 190,910.70 = 75,406.88 : x
  2. Step 2: Convert to fraction form
    138,342.96/190,910.70 = 75,406.88/x
  3. Step 3: Cross multiply
    138,342.96x = 190,910.70 × 75,406.88
  4. Step 4: Simplify right side
    138,342.96x = 14,395,979,868.58
  5. Step 5: Solve for x
    x = 14,395,979,868.58/138,342.96
  6. Step 6: Final answer
    x = 104,060.09

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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.