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Finding the Fourth Proportional to 124,076.76, 171,134.24 and 78,715.68

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Solution

The fourth proportional to 124,076.76, 171,134.24 and 78,715.68 is: 108,569.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,076.76 : 171,134.24 = 78,715.68 : x
  2. Step 2: Convert to fraction form
    124,076.76/171,134.24 = 78,715.68/x
  3. Step 3: Cross multiply
    124,076.76x = 171,134.24 × 78,715.68
  4. Step 4: Simplify right side
    124,076.76x = 13,470,948,072.88
  5. Step 5: Solve for x
    x = 13,470,948,072.88/124,076.76
  6. Step 6: Final answer
    x = 108,569.47

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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.