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Finding the Fourth Proportional to 129,803.05, 179,144.52 and 75,343.51

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Solution

The fourth proportional to 129,803.05, 179,144.52 and 75,343.51 is: 103,983.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,803.05 : 179,144.52 = 75,343.51 : x
  2. Step 2: Convert to fraction form
    129,803.05/179,144.52 = 75,343.51/x
  3. Step 3: Cross multiply
    129,803.05x = 179,144.52 × 75,343.51
  4. Step 4: Simplify right side
    129,803.05x = 13,497,376,934.07
  5. Step 5: Solve for x
    x = 13,497,376,934.07/129,803.05
  6. Step 6: Final answer
    x = 103,983.51

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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.