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Finding the Fourth Proportional to 139,561.32, 192,573.54 and 85,855.08

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Solution

The fourth proportional to 139,561.32, 192,573.54 and 85,855.08 is: 118,467.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,561.32 : 192,573.54 = 85,855.08 : x
  2. Step 2: Convert to fraction form
    139,561.32/192,573.54 = 85,855.08/x
  3. Step 3: Cross multiply
    139,561.32x = 192,573.54 × 85,855.08
  4. Step 4: Simplify right side
    139,561.32x = 16,533,416,682.58
  5. Step 5: Solve for x
    x = 16,533,416,682.58/139,561.32
  6. Step 6: Final answer
    x = 118,467.04

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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.