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Finding the Fourth Proportional to 136,442.88, 188,384.04 and 85,476.72

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Solution

The fourth proportional to 136,442.88, 188,384.04 and 85,476.72 is: 118,016.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,442.88 : 188,384.04 = 85,476.72 : x
  2. Step 2: Convert to fraction form
    136,442.88/188,384.04 = 85,476.72/x
  3. Step 3: Cross multiply
    136,442.88x = 188,384.04 × 85,476.72
  4. Step 4: Simplify right side
    136,442.88x = 16,102,449,839.55
  5. Step 5: Solve for x
    x = 16,102,449,839.55/136,442.88
  6. Step 6: Final answer
    x = 118,016.05

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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.