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Finding the Fourth Proportional to 189,359.90, 261,339.80 and 108,787.27

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Solution

The fourth proportional to 189,359.90, 261,339.80 and 108,787.27 is: 150,139.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,359.90 : 261,339.80 = 108,787.27 : x
  2. Step 2: Convert to fraction form
    189,359.90/261,339.80 = 108,787.27/x
  3. Step 3: Cross multiply
    189,359.90x = 261,339.80 × 108,787.27
  4. Step 4: Simplify right side
    189,359.90x = 28,430,443,384.35
  5. Step 5: Solve for x
    x = 28,430,443,384.35/189,359.90
  6. Step 6: Final answer
    x = 150,139.73

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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.