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Finding the Fourth Proportional to 64,082.64, 87,791.75 and 61,686.72

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Solution

The fourth proportional to 64,082.64, 87,791.75 and 61,686.72 is: 84,509.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,082.64 : 87,791.75 = 61,686.72 : x
  2. Step 2: Convert to fraction form
    64,082.64/87,791.75 = 61,686.72/x
  3. Step 3: Cross multiply
    64,082.64x = 87,791.75 × 61,686.72
  4. Step 4: Simplify right side
    64,082.64x = 5,415,584,792.13
  5. Step 5: Solve for x
    x = 5,415,584,792.13/64,082.64
  6. Step 6: Final answer
    x = 84,509.39

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.