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Finding the Fourth Proportional to 71,345.68, 98,453.23 and 39,078.63

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Solution

The fourth proportional to 71,345.68, 98,453.23 and 39,078.63 is: 53,926.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,345.68 : 98,453.23 = 39,078.63 : x
  2. Step 2: Convert to fraction form
    71,345.68/98,453.23 = 39,078.63/x
  3. Step 3: Cross multiply
    71,345.68x = 98,453.23 × 39,078.63
  4. Step 4: Simplify right side
    71,345.68x = 3,847,417,249.78
  5. Step 5: Solve for x
    x = 3,847,417,249.78/71,345.68
  6. Step 6: Final answer
    x = 53,926.42

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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.