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Finding the Fourth Proportional to 125,855.60, 188,783.40 and 42,749.60

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Solution

The fourth proportional to 125,855.60, 188,783.40 and 42,749.60 is: 64,124.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,855.60 : 188,783.40 = 42,749.60 : x
  2. Step 2: Convert to fraction form
    125,855.60/188,783.40 = 42,749.60/x
  3. Step 3: Cross multiply
    125,855.60x = 188,783.40 × 42,749.60
  4. Step 4: Simplify right side
    125,855.60x = 8,070,414,836.64
  5. Step 5: Solve for x
    x = 8,070,414,836.64/125,855.60
  6. Step 6: Final answer
    x = 64,124.40

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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.