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Finding the Fourth Proportional to 77,664.71, 107,151.52 and 63,299.87

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Solution

The fourth proportional to 77,664.71, 107,151.52 and 63,299.87 is: 87,332.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,664.71 : 107,151.52 = 63,299.87 : x
  2. Step 2: Convert to fraction form
    77,664.71/107,151.52 = 63,299.87/x
  3. Step 3: Cross multiply
    77,664.71x = 107,151.52 × 63,299.87
  4. Step 4: Simplify right side
    77,664.71x = 6,782,676,592.30
  5. Step 5: Solve for x
    x = 6,782,676,592.30/77,664.71
  6. Step 6: Final answer
    x = 87,332.80

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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.