Home / 138,629.58-191,360.67-107,942.01

Finding the Fourth Proportional to 138,629.58, 191,360.67 and 107,942.01

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Solution

The fourth proportional to 138,629.58, 191,360.67 and 107,942.01 is: 149,000.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,629.58 : 191,360.67 = 107,942.01 : x
  2. Step 2: Convert to fraction form
    138,629.58/191,360.67 = 107,942.01/x
  3. Step 3: Cross multiply
    138,629.58x = 191,360.67 × 107,942.01
  4. Step 4: Simplify right side
    138,629.58x = 20,655,855,354.75
  5. Step 5: Solve for x
    x = 20,655,855,354.75/138,629.58
  6. Step 6: Final answer
    x = 149,000.35

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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.