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Finding the Fourth Proportional to 77,260.63, 115,866.38 and 72,217.41

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Solution

The fourth proportional to 77,260.63, 115,866.38 and 72,217.41 is: 108,303.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,260.63 : 115,866.38 = 72,217.41 : x
  2. Step 2: Convert to fraction form
    77,260.63/115,866.38 = 72,217.41/x
  3. Step 3: Cross multiply
    77,260.63x = 115,866.38 × 72,217.41
  4. Step 4: Simplify right side
    77,260.63x = 8,367,569,861.25
  5. Step 5: Solve for x
    x = 8,367,569,861.25/77,260.63
  6. Step 6: Final answer
    x = 108,303.15

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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.