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Finding the Fourth Proportional to 72,925.25, 100,636.86 and 39,391.25

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Solution

The fourth proportional to 72,925.25, 100,636.86 and 39,391.25 is: 54,359.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,925.25 : 100,636.86 = 39,391.25 : x
  2. Step 2: Convert to fraction form
    72,925.25/100,636.86 = 39,391.25/x
  3. Step 3: Cross multiply
    72,925.25x = 100,636.86 × 39,391.25
  4. Step 4: Simplify right side
    72,925.25x = 3,964,211,711.48
  5. Step 5: Solve for x
    x = 3,964,211,711.48/72,925.25
  6. Step 6: Final answer
    x = 54,359.93

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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.