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Finding the Fourth Proportional to 143,189.55, 197,510.81 and 87,974.69

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Solution

The fourth proportional to 143,189.55, 197,510.81 and 87,974.69 is: 121,349.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,189.55 : 197,510.81 = 87,974.69 : x
  2. Step 2: Convert to fraction form
    143,189.55/197,510.81 = 87,974.69/x
  3. Step 3: Cross multiply
    143,189.55x = 197,510.81 × 87,974.69
  4. Step 4: Simplify right side
    143,189.55x = 17,375,950,853.97
  5. Step 5: Solve for x
    x = 17,375,950,853.97/143,189.55
  6. Step 6: Final answer
    x = 121,349.29

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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.