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Finding the Fourth Proportional to 63,347.86, 87,406.35 and 40,386.41

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Solution

The fourth proportional to 63,347.86, 87,406.35 and 40,386.41 is: 55,724.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,347.86 : 87,406.35 = 40,386.41 : x
  2. Step 2: Convert to fraction form
    63,347.86/87,406.35 = 40,386.41/x
  3. Step 3: Cross multiply
    63,347.86x = 87,406.35 × 40,386.41
  4. Step 4: Simplify right side
    63,347.86x = 3,530,028,687.70
  5. Step 5: Solve for x
    x = 3,530,028,687.70/63,347.86
  6. Step 6: Final answer
    x = 55,724.51

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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.