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Finding the Fourth Proportional to 216,539.64, 324,835.86 and 91,838.52

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Solution

The fourth proportional to 216,539.64, 324,835.86 and 91,838.52 is: 137,768.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,539.64 : 324,835.86 = 91,838.52 : x
  2. Step 2: Convert to fraction form
    216,539.64/324,835.86 = 91,838.52/x
  3. Step 3: Cross multiply
    216,539.64x = 324,835.86 × 91,838.52
  4. Step 4: Simplify right side
    216,539.64x = 29,832,444,625.33
  5. Step 5: Solve for x
    x = 29,832,444,625.33/216,539.64
  6. Step 6: Final answer
    x = 137,768.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.