Home / 142,872.45-197,153.22-78,331.38

Finding the Fourth Proportional to 142,872.45, 197,153.22 and 78,331.38

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Solution

The fourth proportional to 142,872.45, 197,153.22 and 78,331.38 is: 108,091.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,872.45 : 197,153.22 = 78,331.38 : x
  2. Step 2: Convert to fraction form
    142,872.45/197,153.22 = 78,331.38/x
  3. Step 3: Cross multiply
    142,872.45x = 197,153.22 × 78,331.38
  4. Step 4: Simplify right side
    142,872.45x = 15,443,283,794.04
  5. Step 5: Solve for x
    x = 15,443,283,794.04/142,872.45
  6. Step 6: Final answer
    x = 108,091.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.