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Finding the Fourth Proportional to 125,886.60, 188,829.90 and 42,780.60

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Solution

The fourth proportional to 125,886.60, 188,829.90 and 42,780.60 is: 64,170.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,886.60 : 188,829.90 = 42,780.60 : x
  2. Step 2: Convert to fraction form
    125,886.60/188,829.90 = 42,780.60/x
  3. Step 3: Cross multiply
    125,886.60x = 188,829.90 × 42,780.60
  4. Step 4: Simplify right side
    125,886.60x = 8,078,256,419.94
  5. Step 5: Solve for x
    x = 8,078,256,419.94/125,886.60
  6. Step 6: Final answer
    x = 64,170.90

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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.