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Finding the Fourth Proportional to 76,886.40, 115,232.40 and 68,527.20

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Solution

The fourth proportional to 76,886.40, 115,232.40 and 68,527.20 is: 102,704.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,886.40 : 115,232.40 = 68,527.20 : x
  2. Step 2: Convert to fraction form
    76,886.40/115,232.40 = 68,527.20/x
  3. Step 3: Cross multiply
    76,886.40x = 115,232.40 × 68,527.20
  4. Step 4: Simplify right side
    76,886.40x = 7,896,553,721.28
  5. Step 5: Solve for x
    x = 7,896,553,721.28/76,886.40
  6. Step 6: Final answer
    x = 102,704.17

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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.