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Finding the Fourth Proportional to 139,051.96, 191,891.10 and 75,389.56

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Solution

The fourth proportional to 139,051.96, 191,891.10 and 75,389.56 is: 104,037.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,051.96 : 191,891.10 = 75,389.56 : x
  2. Step 2: Convert to fraction form
    139,051.96/191,891.10 = 75,389.56/x
  3. Step 3: Cross multiply
    139,051.96x = 191,891.10 × 75,389.56
  4. Step 4: Simplify right side
    139,051.96x = 14,466,585,596.92
  5. Step 5: Solve for x
    x = 14,466,585,596.92/139,051.96
  6. Step 6: Final answer
    x = 104,037.26

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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.