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Finding the Fourth Proportional to 131,293.40, 197,037.30 and 86,905.40

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Solution

The fourth proportional to 131,293.40, 197,037.30 and 86,905.40 is: 130,422.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,293.40 : 197,037.30 = 86,905.40 : x
  2. Step 2: Convert to fraction form
    131,293.40/197,037.30 = 86,905.40/x
  3. Step 3: Cross multiply
    131,293.40x = 197,037.30 × 86,905.40
  4. Step 4: Simplify right side
    131,293.40x = 17,123,605,371.42
  5. Step 5: Solve for x
    x = 17,123,605,371.42/131,293.40
  6. Step 6: Final answer
    x = 130,422.44

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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.