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Finding the Fourth Proportional to 125,953.92, 188,996.76 and 81,569.16

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Solution

The fourth proportional to 125,953.92, 188,996.76 and 81,569.16 is: 122,396.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,953.92 : 188,996.76 = 81,569.16 : x
  2. Step 2: Convert to fraction form
    125,953.92/188,996.76 = 81,569.16/x
  3. Step 3: Cross multiply
    125,953.92x = 188,996.76 × 81,569.16
  4. Step 4: Simplify right side
    125,953.92x = 15,416,306,955.92
  5. Step 5: Solve for x
    x = 15,416,306,955.92/125,953.92
  6. Step 6: Final answer
    x = 122,396.40

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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.