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Finding the Fourth Proportional to 125,976.20, 189,037.20 and 47,098.40

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Solution

The fourth proportional to 125,976.20, 189,037.20 and 47,098.40 is: 70,674.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,976.20 : 189,037.20 = 47,098.40 : x
  2. Step 2: Convert to fraction form
    125,976.20/189,037.20 = 47,098.40/x
  3. Step 3: Cross multiply
    125,976.20x = 189,037.20 × 47,098.40
  4. Step 4: Simplify right side
    125,976.20x = 8,903,349,660.48
  5. Step 5: Solve for x
    x = 8,903,349,660.48/125,976.20
  6. Step 6: Final answer
    x = 70,674.85

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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.