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Finding the Fourth Proportional to 129,934.69, 179,309.88 and 70,318.69

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Solution

The fourth proportional to 129,934.69, 179,309.88 and 70,318.69 is: 97,039.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,934.69 : 179,309.88 = 70,318.69 : x
  2. Step 2: Convert to fraction form
    129,934.69/179,309.88 = 70,318.69/x
  3. Step 3: Cross multiply
    129,934.69x = 179,309.88 × 70,318.69
  4. Step 4: Simplify right side
    129,934.69x = 12,608,835,417.38
  5. Step 5: Solve for x
    x = 12,608,835,417.38/129,934.69
  6. Step 6: Final answer
    x = 97,039.79

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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.