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Finding the Fourth Proportional to 138,861.60, 191,629.02 and 75,199.56

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Solution

The fourth proportional to 138,861.60, 191,629.02 and 75,199.56 is: 103,775.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,861.60 : 191,629.02 = 75,199.56 : x
  2. Step 2: Convert to fraction form
    138,861.60/191,629.02 = 75,199.56/x
  3. Step 3: Cross multiply
    138,861.60x = 191,629.02 × 75,199.56
  4. Step 4: Simplify right side
    138,861.60x = 14,410,417,987.23
  5. Step 5: Solve for x
    x = 14,410,417,987.23/138,861.60
  6. Step 6: Final answer
    x = 103,775.40

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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.