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Finding the Fourth Proportional to 231,989.92, 320,140.80 and 135,187.72

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Solution

The fourth proportional to 231,989.92, 320,140.80 and 135,187.72 is: 186,555.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,989.92 : 320,140.80 = 135,187.72 : x
  2. Step 2: Convert to fraction form
    231,989.92/320,140.80 = 135,187.72/x
  3. Step 3: Cross multiply
    231,989.92x = 320,140.80 × 135,187.72
  4. Step 4: Simplify right side
    231,989.92x = 43,279,104,830.98
  5. Step 5: Solve for x
    x = 43,279,104,830.98/231,989.92
  6. Step 6: Final answer
    x = 186,555.97

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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.