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Finding the Fourth Proportional to 101,613.79, 140,295.47 and 63,431.47

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Solution

The fourth proportional to 101,613.79, 140,295.47 and 63,431.47 is: 87,578.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,613.79 : 140,295.47 = 63,431.47 : x
  2. Step 2: Convert to fraction form
    101,613.79/140,295.47 = 63,431.47/x
  3. Step 3: Cross multiply
    101,613.79x = 140,295.47 × 63,431.47
  4. Step 4: Simplify right side
    101,613.79x = 8,899,147,579.28
  5. Step 5: Solve for x
    x = 8,899,147,579.28/101,613.79
  6. Step 6: Final answer
    x = 87,578.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.