Home / 131,628.60-197,183.70-78,881.40

Finding the Fourth Proportional to 131,628.60, 197,183.70 and 78,881.40

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Solution

The fourth proportional to 131,628.60, 197,183.70 and 78,881.40 is: 118,166.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,628.60 : 197,183.70 = 78,881.40 : x
  2. Step 2: Convert to fraction form
    131,628.60/197,183.70 = 78,881.40/x
  3. Step 3: Cross multiply
    131,628.60x = 197,183.70 × 78,881.40
  4. Step 4: Simplify right side
    131,628.60x = 15,554,126,313.18
  5. Step 5: Solve for x
    x = 15,554,126,313.18/131,628.60
  6. Step 6: Final answer
    x = 118,166.77

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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.