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Finding the Fourth Proportional to 120,399.84, 166,088.78 and 74,444.79

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Solution

The fourth proportional to 120,399.84, 166,088.78 and 74,444.79 is: 102,694.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,399.84 : 166,088.78 = 74,444.79 : x
  2. Step 2: Convert to fraction form
    120,399.84/166,088.78 = 74,444.79/x
  3. Step 3: Cross multiply
    120,399.84x = 166,088.78 × 74,444.79
  4. Step 4: Simplify right side
    120,399.84x = 12,364,443,145.79
  5. Step 5: Solve for x
    x = 12,364,443,145.79/120,399.84
  6. Step 6: Final answer
    x = 102,694.85

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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.