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Finding the Fourth Proportional to 202,438.99, 279,103.75 and 138,662.83

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Solution

The fourth proportional to 202,438.99, 279,103.75 and 138,662.83 is: 191,175.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,438.99 : 279,103.75 = 138,662.83 : x
  2. Step 2: Convert to fraction form
    202,438.99/279,103.75 = 138,662.83/x
  3. Step 3: Cross multiply
    202,438.99x = 279,103.75 × 138,662.83
  4. Step 4: Simplify right side
    202,438.99x = 38,701,315,838.61
  5. Step 5: Solve for x
    x = 38,701,315,838.61/202,438.99
  6. Step 6: Final answer
    x = 191,175.21

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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.