Home / 131,426.40-197,139.60-87,103.20

Finding the Fourth Proportional to 131,426.40, 197,139.60 and 87,103.20

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Solution

The fourth proportional to 131,426.40, 197,139.60 and 87,103.20 is: 130,654.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,426.40 : 197,139.60 = 87,103.20 : x
  2. Step 2: Convert to fraction form
    131,426.40/197,139.60 = 87,103.20/x
  3. Step 3: Cross multiply
    131,426.40x = 197,139.60 × 87,103.20
  4. Step 4: Simplify right side
    131,426.40x = 17,171,490,006.72
  5. Step 5: Solve for x
    x = 17,171,490,006.72/131,426.40
  6. Step 6: Final answer
    x = 130,654.80

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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.