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Finding the Fourth Proportional to 75,003.70, 112,505.55 and 66,838.90

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Solution

The fourth proportional to 75,003.70, 112,505.55 and 66,838.90 is: 100,258.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,003.70 : 112,505.55 = 66,838.90 : x
  2. Step 2: Convert to fraction form
    75,003.70/112,505.55 = 66,838.90/x
  3. Step 3: Cross multiply
    75,003.70x = 112,505.55 × 66,838.90
  4. Step 4: Simplify right side
    75,003.70x = 7,519,747,205.90
  5. Step 5: Solve for x
    x = 7,519,747,205.90/75,003.70
  6. Step 6: Final answer
    x = 100,258.35

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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.