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Finding the Fourth Proportional to 149,031.66, 205,659.51 and 81,963.66

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Solution

The fourth proportional to 149,031.66, 205,659.51 and 81,963.66 is: 113,107.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,031.66 : 205,659.51 = 81,963.66 : x
  2. Step 2: Convert to fraction form
    149,031.66/205,659.51 = 81,963.66/x
  3. Step 3: Cross multiply
    149,031.66x = 205,659.51 × 81,963.66
  4. Step 4: Simplify right side
    149,031.66x = 16,856,606,153.41
  5. Step 5: Solve for x
    x = 16,856,606,153.41/149,031.66
  6. Step 6: Final answer
    x = 113,107.55

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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.