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Finding the Fourth Proportional to 238,272.72, 328,824.08 and 137,670.72

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Solution

The fourth proportional to 238,272.72, 328,824.08 and 137,670.72 is: 189,990.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,272.72 : 328,824.08 = 137,670.72 : x
  2. Step 2: Convert to fraction form
    238,272.72/328,824.08 = 137,670.72/x
  3. Step 3: Cross multiply
    238,272.72x = 328,824.08 × 137,670.72
  4. Step 4: Simplify right side
    238,272.72x = 45,269,447,846.94
  5. Step 5: Solve for x
    x = 45,269,447,846.94/238,272.72
  6. Step 6: Final answer
    x = 189,990.06

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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.