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Finding the Fourth Proportional to 120,700.96, 166,705.57 and 79,492.17

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Solution

The fourth proportional to 120,700.96, 166,705.57 and 79,492.17 is: 109,790.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,700.96 : 166,705.57 = 79,492.17 : x
  2. Step 2: Convert to fraction form
    120,700.96/166,705.57 = 79,492.17/x
  3. Step 3: Cross multiply
    120,700.96x = 166,705.57 × 79,492.17
  4. Step 4: Simplify right side
    120,700.96x = 13,251,787,510.39
  5. Step 5: Solve for x
    x = 13,251,787,510.39/120,700.96
  6. Step 6: Final answer
    x = 109,790.24

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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.