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Finding the Fourth Proportional to 74,671.57, 111,749.02 and 71,571.50

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Solution

The fourth proportional to 74,671.57, 111,749.02 and 71,571.50 is: 107,109.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,671.57 : 111,749.02 = 71,571.50 : x
  2. Step 2: Convert to fraction form
    74,671.57/111,749.02 = 71,571.50/x
  3. Step 3: Cross multiply
    74,671.57x = 111,749.02 × 71,571.50
  4. Step 4: Simplify right side
    74,671.57x = 7,998,044,666.31
  5. Step 5: Solve for x
    x = 7,998,044,666.31/74,671.57
  6. Step 6: Final answer
    x = 107,109.63

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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.