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Finding the Fourth Proportional to 66,393.44, 91,621.68 and 36,178.40

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Solution

The fourth proportional to 66,393.44, 91,621.68 and 36,178.40 is: 49,925.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,393.44 : 91,621.68 = 36,178.40 : x
  2. Step 2: Convert to fraction form
    66,393.44/91,621.68 = 36,178.40/x
  3. Step 3: Cross multiply
    66,393.44x = 91,621.68 × 36,178.40
  4. Step 4: Simplify right side
    66,393.44x = 3,314,725,787.71
  5. Step 5: Solve for x
    x = 3,314,725,787.71/66,393.44
  6. Step 6: Final answer
    x = 49,925.50

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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.