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Finding the Fourth Proportional to 143,330.60, 214,995.90 and 72,471.80

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Solution

The fourth proportional to 143,330.60, 214,995.90 and 72,471.80 is: 108,707.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,330.60 : 214,995.90 = 72,471.80 : x
  2. Step 2: Convert to fraction form
    143,330.60/214,995.90 = 72,471.80/x
  3. Step 3: Cross multiply
    143,330.60x = 214,995.90 × 72,471.80
  4. Step 4: Simplify right side
    143,330.60x = 15,581,139,865.62
  5. Step 5: Solve for x
    x = 15,581,139,865.62/143,330.60
  6. Step 6: Final answer
    x = 108,707.70

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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.