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Finding the Fourth Proportional to 92,555.40, 138,833.10 and 85,338.30

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Solution

The fourth proportional to 92,555.40, 138,833.10 and 85,338.30 is: 128,007.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,555.40 : 138,833.10 = 85,338.30 : x
  2. Step 2: Convert to fraction form
    92,555.40/138,833.10 = 85,338.30/x
  3. Step 3: Cross multiply
    92,555.40x = 138,833.10 × 85,338.30
  4. Step 4: Simplify right side
    92,555.40x = 11,847,780,737.73
  5. Step 5: Solve for x
    x = 11,847,780,737.73/92,555.40
  6. Step 6: Final answer
    x = 128,007.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.