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Finding the Fourth Proportional to 62,778.90, 86,409.54 and 56,797.86

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Solution

The fourth proportional to 62,778.90, 86,409.54 and 56,797.86 is: 78,177.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,778.90 : 86,409.54 = 56,797.86 : x
  2. Step 2: Convert to fraction form
    62,778.90/86,409.54 = 56,797.86/x
  3. Step 3: Cross multiply
    62,778.90x = 86,409.54 × 56,797.86
  4. Step 4: Simplify right side
    62,778.90x = 4,907,876,955.58
  5. Step 5: Solve for x
    x = 4,907,876,955.58/62,778.90
  6. Step 6: Final answer
    x = 78,177.17

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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.