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Finding the Fourth Proportional to 76,718.80, 114,927.56 and 68,359.60

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Solution

The fourth proportional to 76,718.80, 114,927.56 and 68,359.60 is: 102,405.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,718.80 : 114,927.56 = 68,359.60 : x
  2. Step 2: Convert to fraction form
    76,718.80/114,927.56 = 68,359.60/x
  3. Step 3: Cross multiply
    76,718.80x = 114,927.56 × 68,359.60
  4. Step 4: Simplify right side
    76,718.80x = 7,856,402,030.58
  5. Step 5: Solve for x
    x = 7,856,402,030.58/76,718.80
  6. Step 6: Final answer
    x = 102,405.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.