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Finding the Fourth Proportional to 138,946.02, 191,745.90 and 75,283.80

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Solution

The fourth proportional to 138,946.02, 191,745.90 and 75,283.80 is: 103,891.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,946.02 : 191,745.90 = 75,283.80 : x
  2. Step 2: Convert to fraction form
    138,946.02/191,745.90 = 75,283.80/x
  3. Step 3: Cross multiply
    138,946.02x = 191,745.90 × 75,283.80
  4. Step 4: Simplify right side
    138,946.02x = 14,435,359,986.42
  5. Step 5: Solve for x
    x = 14,435,359,986.42/138,946.02
  6. Step 6: Final answer
    x = 103,891.86

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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.