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Finding the Fourth Proportional to 239,040, 329,875.20 and 133,056

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Solution

The fourth proportional to 239,040, 329,875.20 and 133,056 is: 183,617.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,040 : 329,875.20 = 133,056 : x
  2. Step 2: Convert to fraction form
    239,040/329,875.20 = 133,056/x
  3. Step 3: Cross multiply
    239,040x = 329,875.20 × 133,056
  4. Step 4: Simplify right side
    239,040x = 43,891,874,611.20
  5. Step 5: Solve for x
    x = 43,891,874,611.20/239,040
  6. Step 6: Final answer
    x = 183,617.28

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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.