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Finding the Fourth Proportional to 130,409.46, 179,965.80 and 76,696.74

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Solution

The fourth proportional to 130,409.46, 179,965.80 and 76,696.74 is: 105,841.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,409.46 : 179,965.80 = 76,696.74 : x
  2. Step 2: Convert to fraction form
    130,409.46/179,965.80 = 76,696.74/x
  3. Step 3: Cross multiply
    130,409.46x = 179,965.80 × 76,696.74
  4. Step 4: Simplify right side
    130,409.46x = 13,802,790,171.49
  5. Step 5: Solve for x
    x = 13,802,790,171.49/130,409.46
  6. Step 6: Final answer
    x = 105,841.94

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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.