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Finding the Fourth Proportional to 134,807.72, 186,033.42 and 74,378.90

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Solution

The fourth proportional to 134,807.72, 186,033.42 and 74,378.90 is: 102,642.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,807.72 : 186,033.42 = 74,378.90 : x
  2. Step 2: Convert to fraction form
    134,807.72/186,033.42 = 74,378.90/x
  3. Step 3: Cross multiply
    134,807.72x = 186,033.42 × 74,378.90
  4. Step 4: Simplify right side
    134,807.72x = 13,836,961,142.84
  5. Step 5: Solve for x
    x = 13,836,961,142.84/134,807.72
  6. Step 6: Final answer
    x = 102,642.20

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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.