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Finding the Fourth Proportional to 129,750, 179,055.02 and 70,134

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Solution

The fourth proportional to 129,750, 179,055.02 and 70,134 is: 96,784.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,750 : 179,055.02 = 70,134 : x
  2. Step 2: Convert to fraction form
    129,750/179,055.02 = 70,134/x
  3. Step 3: Cross multiply
    129,750x = 179,055.02 × 70,134
  4. Step 4: Simplify right side
    129,750x = 12,557,844,772.68
  5. Step 5: Solve for x
    x = 12,557,844,772.68/129,750
  6. Step 6: Final answer
    x = 96,784.93

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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.