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Finding the Fourth Proportional to 139,915.64, 193,067.34 and 85,440.44

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Solution

The fourth proportional to 139,915.64, 193,067.34 and 85,440.44 is: 117,897.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,915.64 : 193,067.34 = 85,440.44 : x
  2. Step 2: Convert to fraction form
    139,915.64/193,067.34 = 85,440.44/x
  3. Step 3: Cross multiply
    139,915.64x = 193,067.34 × 85,440.44
  4. Step 4: Simplify right side
    139,915.64x = 16,495,758,479.23
  5. Step 5: Solve for x
    x = 16,495,758,479.23/139,915.64
  6. Step 6: Final answer
    x = 117,897.89

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1.5x scale

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.