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Finding the Fourth Proportional to 125,765.48, 188,602.56 and 68,881.64

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Solution

The fourth proportional to 125,765.48, 188,602.56 and 68,881.64 is: 103,297.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,765.48 : 188,602.56 = 68,881.64 : x
  2. Step 2: Convert to fraction form
    125,765.48/188,602.56 = 68,881.64/x
  3. Step 3: Cross multiply
    125,765.48x = 188,602.56 × 68,881.64
  4. Step 4: Simplify right side
    125,765.48x = 12,991,252,697.99
  5. Step 5: Solve for x
    x = 12,991,252,697.99/125,765.48
  6. Step 6: Final answer
    x = 103,297.45

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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.