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Finding the Fourth Proportional to 124,625.40, 171,981.84 and 76,859.64

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Solution

The fourth proportional to 124,625.40, 171,981.84 and 76,859.64 is: 106,065.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,625.40 : 171,981.84 = 76,859.64 : x
  2. Step 2: Convert to fraction form
    124,625.40/171,981.84 = 76,859.64/x
  3. Step 3: Cross multiply
    124,625.40x = 171,981.84 × 76,859.64
  4. Step 4: Simplify right side
    124,625.40x = 13,218,462,308.94
  5. Step 5: Solve for x
    x = 13,218,462,308.94/124,625.40
  6. Step 6: Final answer
    x = 106,065.56

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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.