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Finding the Fourth Proportional to 125,356.60, 187,858.10 and 69,221.98

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Solution

The fourth proportional to 125,356.60, 187,858.10 and 69,221.98 is: 103,735.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,356.60 : 187,858.10 = 69,221.98 : x
  2. Step 2: Convert to fraction form
    125,356.60/187,858.10 = 69,221.98/x
  3. Step 3: Cross multiply
    125,356.60x = 187,858.10 × 69,221.98
  4. Step 4: Simplify right side
    125,356.60x = 13,003,910,048.92
  5. Step 5: Solve for x
    x = 13,003,910,048.92/125,356.60
  6. Step 6: Final answer
    x = 103,735.34

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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.