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Finding the Fourth Proportional to 138,607.76, 191,278.60 and 74,945.52

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Solution

The fourth proportional to 138,607.76, 191,278.60 and 74,945.52 is: 103,424.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,607.76 : 191,278.60 = 74,945.52 : x
  2. Step 2: Convert to fraction form
    138,607.76/191,278.60 = 74,945.52/x
  3. Step 3: Cross multiply
    138,607.76x = 191,278.60 × 74,945.52
  4. Step 4: Simplify right side
    138,607.76x = 14,335,474,141.87
  5. Step 5: Solve for x
    x = 14,335,474,141.87/138,607.76
  6. Step 6: Final answer
    x = 103,424.76

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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.