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Finding the Fourth Proportional to 71,639.76, 98,871.96 and 43,345.68

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Solution

The fourth proportional to 71,639.76, 98,871.96 and 43,345.68 is: 59,822.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,639.76 : 98,871.96 = 43,345.68 : x
  2. Step 2: Convert to fraction form
    71,639.76/98,871.96 = 43,345.68/x
  3. Step 3: Cross multiply
    71,639.76x = 98,871.96 × 43,345.68
  4. Step 4: Simplify right side
    71,639.76x = 4,285,672,339.13
  5. Step 5: Solve for x
    x = 4,285,672,339.13/71,639.76
  6. Step 6: Final answer
    x = 59,822.54

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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.