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Finding the Fourth Proportional to 126,522.40, 189,783.60 and 79,981.60

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Solution

The fourth proportional to 126,522.40, 189,783.60 and 79,981.60 is: 119,972.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,522.40 : 189,783.60 = 79,981.60 : x
  2. Step 2: Convert to fraction form
    126,522.40/189,783.60 = 79,981.60/x
  3. Step 3: Cross multiply
    126,522.40x = 189,783.60 × 79,981.60
  4. Step 4: Simplify right side
    126,522.40x = 15,179,195,981.76
  5. Step 5: Solve for x
    x = 15,179,195,981.76/126,522.40
  6. Step 6: Final answer
    x = 119,972.40

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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.