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Finding the Fourth Proportional to 161,882.70, 242,718.93 and 77,640.90

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Solution

The fourth proportional to 161,882.70, 242,718.93 and 77,640.90 is: 116,410.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,882.70 : 242,718.93 = 77,640.90 : x
  2. Step 2: Convert to fraction form
    161,882.70/242,718.93 = 77,640.90/x
  3. Step 3: Cross multiply
    161,882.70x = 242,718.93 × 77,640.90
  4. Step 4: Simplify right side
    161,882.70x = 18,844,916,172.24
  5. Step 5: Solve for x
    x = 18,844,916,172.24/161,882.70
  6. Step 6: Final answer
    x = 116,410.93

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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.