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Finding the Fourth Proportional to 139,609.57, 192,617.70 and 79,175.47

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Solution

The fourth proportional to 139,609.57, 192,617.70 and 79,175.47 is: 109,237.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,609.57 : 192,617.70 = 79,175.47 : x
  2. Step 2: Convert to fraction form
    139,609.57/192,617.70 = 79,175.47/x
  3. Step 3: Cross multiply
    139,609.57x = 192,617.70 × 79,175.47
  4. Step 4: Simplify right side
    139,609.57x = 15,250,596,927.82
  5. Step 5: Solve for x
    x = 15,250,596,927.82/139,609.57
  6. Step 6: Final answer
    x = 109,237.48

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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.