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Finding the Fourth Proportional to 245,691.77, 368,626.32 and 85,791.26

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Solution

The fourth proportional to 245,691.77, 368,626.32 and 85,791.26 is: 128,717.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,691.77 : 368,626.32 = 85,791.26 : x
  2. Step 2: Convert to fraction form
    245,691.77/368,626.32 = 85,791.26/x
  3. Step 3: Cross multiply
    245,691.77x = 368,626.32 × 85,791.26
  4. Step 4: Simplify right side
    245,691.77x = 31,624,916,461.96
  5. Step 5: Solve for x
    x = 31,624,916,461.96/245,691.77
  6. Step 6: Final answer
    x = 128,717.85

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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.