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Finding the Fourth Proportional to 125,861.40, 188,792.10 and 69,874.20

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Solution

The fourth proportional to 125,861.40, 188,792.10 and 69,874.20 is: 104,811.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,861.40 : 188,792.10 = 69,874.20 : x
  2. Step 2: Convert to fraction form
    125,861.40/188,792.10 = 69,874.20/x
  3. Step 3: Cross multiply
    125,861.40x = 188,792.10 × 69,874.20
  4. Step 4: Simplify right side
    125,861.40x = 13,191,696,953.82
  5. Step 5: Solve for x
    x = 13,191,696,953.82/125,861.40
  6. Step 6: Final answer
    x = 104,811.30

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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.