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Finding the Fourth Proportional to 129,927, 179,299.26 and 70,311

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Solution

The fourth proportional to 129,927, 179,299.26 and 70,311 is: 97,029.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,927 : 179,299.26 = 70,311 : x
  2. Step 2: Convert to fraction form
    129,927/179,299.26 = 70,311/x
  3. Step 3: Cross multiply
    129,927x = 179,299.26 × 70,311
  4. Step 4: Simplify right side
    129,927x = 12,606,710,269.86
  5. Step 5: Solve for x
    x = 12,606,710,269.86/129,927
  6. Step 6: Final answer
    x = 97,029.18

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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.