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Finding the Fourth Proportional to 77,110.70, 115,666.05 and 68,654.30

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Solution

The fourth proportional to 77,110.70, 115,666.05 and 68,654.30 is: 102,981.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,110.70 : 115,666.05 = 68,654.30 : x
  2. Step 2: Convert to fraction form
    77,110.70/115,666.05 = 68,654.30/x
  3. Step 3: Cross multiply
    77,110.70x = 115,666.05 × 68,654.30
  4. Step 4: Simplify right side
    77,110.70x = 7,940,971,696.52
  5. Step 5: Solve for x
    x = 7,940,971,696.52/77,110.70
  6. Step 6: Final answer
    x = 102,981.45

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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.