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Finding the Fourth Proportional to 76,802.92, 115,213.59 and 72,603.88

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Solution

The fourth proportional to 76,802.92, 115,213.59 and 72,603.88 is: 108,914.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,802.92 : 115,213.59 = 72,603.88 : x
  2. Step 2: Convert to fraction form
    76,802.92/115,213.59 = 72,603.88/x
  3. Step 3: Cross multiply
    76,802.92x = 115,213.59 × 72,603.88
  4. Step 4: Simplify right side
    76,802.92x = 8,364,953,374.70
  5. Step 5: Solve for x
    x = 8,364,953,374.70/76,802.92
  6. Step 6: Final answer
    x = 108,914.53

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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.