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Finding the Fourth Proportional to 161,716.80, 242,542.80 and 77,476.80

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Solution

The fourth proportional to 161,716.80, 242,542.80 and 77,476.80 is: 116,199.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,716.80 : 242,542.80 = 77,476.80 : x
  2. Step 2: Convert to fraction form
    161,716.80/242,542.80 = 77,476.80/x
  3. Step 3: Cross multiply
    161,716.80x = 242,542.80 × 77,476.80
  4. Step 4: Simplify right side
    161,716.80x = 18,791,440,007.04
  5. Step 5: Solve for x
    x = 18,791,440,007.04/161,716.80
  6. Step 6: Final answer
    x = 116,199.68

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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.