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Finding the Fourth Proportional to 124,610.84, 172,024.64 and 76,890.48

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Solution

The fourth proportional to 124,610.84, 172,024.64 and 76,890.48 is: 106,146.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,610.84 : 172,024.64 = 76,890.48 : x
  2. Step 2: Convert to fraction form
    124,610.84/172,024.64 = 76,890.48/x
  3. Step 3: Cross multiply
    124,610.84x = 172,024.64 × 76,890.48
  4. Step 4: Simplify right side
    124,610.84x = 13,227,057,141.43
  5. Step 5: Solve for x
    x = 13,227,057,141.43/124,610.84
  6. Step 6: Final answer
    x = 106,146.92

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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.