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Finding the Fourth Proportional to 138,358.64, 207,463.72 and 43,571.12

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Solution

The fourth proportional to 138,358.64, 207,463.72 and 43,571.12 is: 65,333.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,358.64 : 207,463.72 = 43,571.12 : x
  2. Step 2: Convert to fraction form
    138,358.64/207,463.72 = 43,571.12/x
  3. Step 3: Cross multiply
    138,358.64x = 207,463.72 × 43,571.12
  4. Step 4: Simplify right side
    138,358.64x = 9,039,426,639.77
  5. Step 5: Solve for x
    x = 9,039,426,639.77/138,358.64
  6. Step 6: Final answer
    x = 65,333.30

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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.