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Finding the Fourth Proportional to 72,695.88, 100,317.69 and 40,867.74

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Solution

The fourth proportional to 72,695.88, 100,317.69 and 40,867.74 is: 56,396.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,695.88 : 100,317.69 = 40,867.74 : x
  2. Step 2: Convert to fraction form
    72,695.88/100,317.69 = 40,867.74/x
  3. Step 3: Cross multiply
    72,695.88x = 100,317.69 × 40,867.74
  4. Step 4: Simplify right side
    72,695.88x = 4,099,757,272.32
  5. Step 5: Solve for x
    x = 4,099,757,272.32/72,695.88
  6. Step 6: Final answer
    x = 56,396.01

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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.