Home / 131,421.30-197,131.95-91,331.70

Finding the Fourth Proportional to 131,421.30, 197,131.95 and 91,331.70

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Solution

The fourth proportional to 131,421.30, 197,131.95 and 91,331.70 is: 136,997.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,421.30 : 197,131.95 = 91,331.70 : x
  2. Step 2: Convert to fraction form
    131,421.30/197,131.95 = 91,331.70/x
  3. Step 3: Cross multiply
    131,421.30x = 197,131.95 × 91,331.70
  4. Step 4: Simplify right side
    131,421.30x = 18,004,396,117.82
  5. Step 5: Solve for x
    x = 18,004,396,117.82/131,421.30
  6. Step 6: Final answer
    x = 136,997.55

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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.