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Finding the Fourth Proportional to 138,861.98, 191,629.24 and 75,199.58

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Solution

The fourth proportional to 138,861.98, 191,629.24 and 75,199.58 is: 103,775.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,861.98 : 191,629.24 = 75,199.58 : x
  2. Step 2: Convert to fraction form
    138,861.98/191,629.24 = 75,199.58/x
  3. Step 3: Cross multiply
    138,861.98x = 191,629.24 × 75,199.58
  4. Step 4: Simplify right side
    138,861.98x = 14,410,438,363.72
  5. Step 5: Solve for x
    x = 14,410,438,363.72/138,861.98
  6. Step 6: Final answer
    x = 103,775.26

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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.