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Finding the Fourth Proportional to 124,458.94, 171,766.30 and 76,711.06

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Solution

The fourth proportional to 124,458.94, 171,766.30 and 76,711.06 is: 105,869.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,458.94 : 171,766.30 = 76,711.06 : x
  2. Step 2: Convert to fraction form
    124,458.94/171,766.30 = 76,711.06/x
  3. Step 3: Cross multiply
    124,458.94x = 171,766.30 × 76,711.06
  4. Step 4: Simplify right side
    124,458.94x = 13,176,374,561.72
  5. Step 5: Solve for x
    x = 13,176,374,561.72/124,458.94
  6. Step 6: Final answer
    x = 105,869.25

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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.