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Finding the Fourth Proportional to 161,844.78, 242,916.89 and 81,938.89

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Solution

The fourth proportional to 161,844.78, 242,916.89 and 81,938.89 is: 122,984.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,844.78 : 242,916.89 = 81,938.89 : x
  2. Step 2: Convert to fraction form
    161,844.78/242,916.89 = 81,938.89/x
  3. Step 3: Cross multiply
    161,844.78x = 242,916.89 × 81,938.89
  4. Step 4: Simplify right side
    161,844.78x = 19,904,340,683.71
  5. Step 5: Solve for x
    x = 19,904,340,683.71/161,844.78
  6. Step 6: Final answer
    x = 122,984.13

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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.