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Finding the Fourth Proportional to 114,940.81, 158,616.79 and 64,639.81

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Solution

The fourth proportional to 114,940.81, 158,616.79 and 64,639.81 is: 89,202.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,940.81 : 158,616.79 = 64,639.81 : x
  2. Step 2: Convert to fraction form
    114,940.81/158,616.79 = 64,639.81/x
  3. Step 3: Cross multiply
    114,940.81x = 158,616.79 × 64,639.81
  4. Step 4: Simplify right side
    114,940.81x = 10,252,959,168.41
  5. Step 5: Solve for x
    x = 10,252,959,168.41/114,940.81
  6. Step 6: Final answer
    x = 89,202.08

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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.