Home / 131,459.20-197,073.60-78,812.80

Finding the Fourth Proportional to 131,459.20, 197,073.60 and 78,812.80

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Solution

The fourth proportional to 131,459.20, 197,073.60 and 78,812.80 is: 118,150.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,459.20 : 197,073.60 = 78,812.80 : x
  2. Step 2: Convert to fraction form
    131,459.20/197,073.60 = 78,812.80/x
  3. Step 3: Cross multiply
    131,459.20x = 197,073.60 × 78,812.80
  4. Step 4: Simplify right side
    131,459.20x = 15,531,922,222.08
  5. Step 5: Solve for x
    x = 15,531,922,222.08/131,459.20
  6. Step 6: Final answer
    x = 118,150.13

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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.