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Finding the Fourth Proportional to 129,722.40, 194,737.20 and 73,607.20

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Solution

The fourth proportional to 129,722.40, 194,737.20 and 73,607.20 is: 110,497.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,722.40 : 194,737.20 = 73,607.20 : x
  2. Step 2: Convert to fraction form
    129,722.40/194,737.20 = 73,607.20/x
  3. Step 3: Cross multiply
    129,722.40x = 194,737.20 × 73,607.20
  4. Step 4: Simplify right side
    129,722.40x = 14,334,060,027.84
  5. Step 5: Solve for x
    x = 14,334,060,027.84/129,722.40
  6. Step 6: Final answer
    x = 110,497.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.