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Finding the Fourth Proportional to 189,489.70, 261,500.54 and 107,813.46

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Solution

The fourth proportional to 189,489.70, 261,500.54 and 107,813.46 is: 148,785.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,489.70 : 261,500.54 = 107,813.46 : x
  2. Step 2: Convert to fraction form
    189,489.70/261,500.54 = 107,813.46/x
  3. Step 3: Cross multiply
    189,489.70x = 261,500.54 × 107,813.46
  4. Step 4: Simplify right side
    189,489.70x = 28,193,278,009.27
  5. Step 5: Solve for x
    x = 28,193,278,009.27/189,489.70
  6. Step 6: Final answer
    x = 148,785.28

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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.