Home / 139,439.40-192,367.08-85,707.24

Finding the Fourth Proportional to 139,439.40, 192,367.08 and 85,707.24

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Solution

The fourth proportional to 139,439.40, 192,367.08 and 85,707.24 is: 118,239.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,439.40 : 192,367.08 = 85,707.24 : x
  2. Step 2: Convert to fraction form
    139,439.40/192,367.08 = 85,707.24/x
  3. Step 3: Cross multiply
    139,439.40x = 192,367.08 × 85,707.24
  4. Step 4: Simplify right side
    139,439.40x = 16,487,251,493.66
  5. Step 5: Solve for x
    x = 16,487,251,493.66/139,439.40
  6. Step 6: Final answer
    x = 118,239.55

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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.