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Finding the Fourth Proportional to 137,339.56, 189,540.52 and 76,909.11

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Solution

The fourth proportional to 137,339.56, 189,540.52 and 76,909.11 is: 106,141.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,339.56 : 189,540.52 = 76,909.11 : x
  2. Step 2: Convert to fraction form
    137,339.56/189,540.52 = 76,909.11/x
  3. Step 3: Cross multiply
    137,339.56x = 189,540.52 × 76,909.11
  4. Step 4: Simplify right side
    137,339.56x = 14,577,392,702.14
  5. Step 5: Solve for x
    x = 14,577,392,702.14/137,339.56
  6. Step 6: Final answer
    x = 106,141.25

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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.