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Finding the Fourth Proportional to 125,856.60, 188,784.90 and 42,750.60

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Solution

The fourth proportional to 125,856.60, 188,784.90 and 42,750.60 is: 64,125.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,856.60 : 188,784.90 = 42,750.60 : x
  2. Step 2: Convert to fraction form
    125,856.60/188,784.90 = 42,750.60/x
  3. Step 3: Cross multiply
    125,856.60x = 188,784.90 × 42,750.60
  4. Step 4: Simplify right side
    125,856.60x = 8,070,667,745.94
  5. Step 5: Solve for x
    x = 8,070,667,745.94/125,856.60
  6. Step 6: Final answer
    x = 64,125.90

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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.