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Finding the Fourth Proportional to 118,981.99, 164,172.40 and 68,010.87

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Solution

The fourth proportional to 118,981.99, 164,172.40 and 68,010.87 is: 93,842.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,981.99 : 164,172.40 = 68,010.87 : x
  2. Step 2: Convert to fraction form
    118,981.99/164,172.40 = 68,010.87/x
  3. Step 3: Cross multiply
    118,981.99x = 164,172.40 × 68,010.87
  4. Step 4: Simplify right side
    118,981.99x = 11,165,507,753.99
  5. Step 5: Solve for x
    x = 11,165,507,753.99/118,981.99
  6. Step 6: Final answer
    x = 93,842.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.