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Finding the Fourth Proportional to 129,938, 179,314.54 and 70,322

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Solution

The fourth proportional to 129,938, 179,314.54 and 70,322 is: 97,044.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,938 : 179,314.54 = 70,322 : x
  2. Step 2: Convert to fraction form
    129,938/179,314.54 = 70,322/x
  3. Step 3: Cross multiply
    129,938x = 179,314.54 × 70,322
  4. Step 4: Simplify right side
    129,938x = 12,609,757,081.88
  5. Step 5: Solve for x
    x = 12,609,757,081.88/129,938
  6. Step 6: Final answer
    x = 97,044.41

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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.