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Finding the Fourth Proportional to 115,959.87, 159,953.88 and 76,668.71

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Solution

The fourth proportional to 115,959.87, 159,953.88 and 76,668.71 is: 105,756.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,959.87 : 159,953.88 = 76,668.71 : x
  2. Step 2: Convert to fraction form
    115,959.87/159,953.88 = 76,668.71/x
  3. Step 3: Cross multiply
    115,959.87x = 159,953.88 × 76,668.71
  4. Step 4: Simplify right side
    115,959.87x = 12,263,457,639.09
  5. Step 5: Solve for x
    x = 12,263,457,639.09/115,959.87
  6. Step 6: Final answer
    x = 105,756.05

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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.