Home / 138,808.20-191,555.10-75,145.98

Finding the Fourth Proportional to 138,808.20, 191,555.10 and 75,145.98

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Solution

The fourth proportional to 138,808.20, 191,555.10 and 75,145.98 is: 103,701.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,808.20 : 191,555.10 = 75,145.98 : x
  2. Step 2: Convert to fraction form
    138,808.20/191,555.10 = 75,145.98/x
  3. Step 3: Cross multiply
    138,808.20x = 191,555.10 × 75,145.98
  4. Step 4: Simplify right side
    138,808.20x = 14,394,595,713.50
  5. Step 5: Solve for x
    x = 14,394,595,713.50/138,808.20
  6. Step 6: Final answer
    x = 103,701.34

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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.