Home / 131,429.70-197,144.55-78,812.10

Finding the Fourth Proportional to 131,429.70, 197,144.55 and 78,812.10

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Solution

The fourth proportional to 131,429.70, 197,144.55 and 78,812.10 is: 118,218.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,429.70 : 197,144.55 = 78,812.10 : x
  2. Step 2: Convert to fraction form
    131,429.70/197,144.55 = 78,812.10/x
  3. Step 3: Cross multiply
    131,429.70x = 197,144.55 × 78,812.10
  4. Step 4: Simplify right side
    131,429.70x = 15,537,375,989.06
  5. Step 5: Solve for x
    x = 15,537,375,989.06/131,429.70
  6. Step 6: Final answer
    x = 118,218.15

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1.5x scale

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.