Home / 142,863.70-197,154.30-78,331.60

Finding the Fourth Proportional to 142,863.70, 197,154.30 and 78,331.60

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Solution

The fourth proportional to 142,863.70, 197,154.30 and 78,331.60 is: 108,098.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,863.70 : 197,154.30 = 78,331.60 : x
  2. Step 2: Convert to fraction form
    142,863.70/197,154.30 = 78,331.60/x
  3. Step 3: Cross multiply
    142,863.70x = 197,154.30 × 78,331.60
  4. Step 4: Simplify right side
    142,863.70x = 15,443,411,765.88
  5. Step 5: Solve for x
    x = 15,443,411,765.88/142,863.70
  6. Step 6: Final answer
    x = 108,098.92

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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.