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Finding the Fourth Proportional to 88,963.28, 133,597.60 and 78,990.56

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Solution

The fourth proportional to 88,963.28, 133,597.60 and 78,990.56 is: 118,621.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,963.28 : 133,597.60 = 78,990.56 : x
  2. Step 2: Convert to fraction form
    88,963.28/133,597.60 = 78,990.56/x
  3. Step 3: Cross multiply
    88,963.28x = 133,597.60 × 78,990.56
  4. Step 4: Simplify right side
    88,963.28x = 10,552,949,238.66
  5. Step 5: Solve for x
    x = 10,552,949,238.66/88,963.28
  6. Step 6: Final answer
    x = 118,621.40

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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.