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Finding the Fourth Proportional to 129,992.84, 179,373.63 and 76,258.25

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Solution

The fourth proportional to 129,992.84, 179,373.63 and 76,258.25 is: 105,226.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,992.84 : 179,373.63 = 76,258.25 : x
  2. Step 2: Convert to fraction form
    129,992.84/179,373.63 = 76,258.25/x
  3. Step 3: Cross multiply
    129,992.84x = 179,373.63 × 76,258.25
  4. Step 4: Simplify right side
    129,992.84x = 13,678,720,190.68
  5. Step 5: Solve for x
    x = 13,678,720,190.68/129,992.84
  6. Step 6: Final answer
    x = 105,226.72

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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.