Home / 251,401.33-346,921-138,202.21

Finding the Fourth Proportional to 251,401.33, 346,921 and 138,202.21

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Solution

The fourth proportional to 251,401.33, 346,921 and 138,202.21 is: 190,711.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,401.33 : 346,921 = 138,202.21 : x
  2. Step 2: Convert to fraction form
    251,401.33/346,921 = 138,202.21/x
  3. Step 3: Cross multiply
    251,401.33x = 346,921 × 138,202.21
  4. Step 4: Simplify right side
    251,401.33x = 47,945,248,895.41
  5. Step 5: Solve for x
    x = 47,945,248,895.41/251,401.33
  6. Step 6: Final answer
    x = 190,711.99

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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.