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Finding the Fourth Proportional to 138,675.75, 191,372.45 and 75,013.54

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Solution

The fourth proportional to 138,675.75, 191,372.45 and 75,013.54 is: 103,518.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,675.75 : 191,372.45 = 75,013.54 : x
  2. Step 2: Convert to fraction form
    138,675.75/191,372.45 = 75,013.54/x
  3. Step 3: Cross multiply
    138,675.75x = 191,372.45 × 75,013.54
  4. Step 4: Simplify right side
    138,675.75x = 14,355,525,366.92
  5. Step 5: Solve for x
    x = 14,355,525,366.92/138,675.75
  6. Step 6: Final answer
    x = 103,518.65

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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.