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Finding the Fourth Proportional to 75,989.70, 104,865.30 and 42,000.54

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Solution

The fourth proportional to 75,989.70, 104,865.30 and 42,000.54 is: 57,960.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,989.70 : 104,865.30 = 42,000.54 : x
  2. Step 2: Convert to fraction form
    75,989.70/104,865.30 = 42,000.54/x
  3. Step 3: Cross multiply
    75,989.70x = 104,865.30 × 42,000.54
  4. Step 4: Simplify right side
    75,989.70x = 4,404,399,227.26
  5. Step 5: Solve for x
    x = 4,404,399,227.26/75,989.70
  6. Step 6: Final answer
    x = 57,960.48

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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.