Home / 149,390.74-206,156.56-81,408.20

Finding the Fourth Proportional to 149,390.74, 206,156.56 and 81,408.20

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Solution

The fourth proportional to 149,390.74, 206,156.56 and 81,408.20 is: 112,341.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,390.74 : 206,156.56 = 81,408.20 : x
  2. Step 2: Convert to fraction form
    149,390.74/206,156.56 = 81,408.20/x
  3. Step 3: Cross multiply
    149,390.74x = 206,156.56 × 81,408.20
  4. Step 4: Simplify right side
    149,390.74x = 16,782,834,467.79
  5. Step 5: Solve for x
    x = 16,782,834,467.79/149,390.74
  6. Step 6: Final answer
    x = 112,341.87

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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.