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Finding the Fourth Proportional to 139,108.70, 191,970.23 and 75,446.55

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Solution

The fourth proportional to 139,108.70, 191,970.23 and 75,446.55 is: 104,116.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,108.70 : 191,970.23 = 75,446.55 : x
  2. Step 2: Convert to fraction form
    139,108.70/191,970.23 = 75,446.55/x
  3. Step 3: Cross multiply
    139,108.70x = 191,970.23 × 75,446.55
  4. Step 4: Simplify right side
    139,108.70x = 14,483,491,556.21
  5. Step 5: Solve for x
    x = 14,483,491,556.21/139,108.70
  6. Step 6: Final answer
    x = 104,116.36

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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.