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Finding the Fourth Proportional to 100,950.42, 139,309.83 and 58,512.90

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Solution

The fourth proportional to 100,950.42, 139,309.83 and 58,512.90 is: 80,746.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,950.42 : 139,309.83 = 58,512.90 : x
  2. Step 2: Convert to fraction form
    100,950.42/139,309.83 = 58,512.90/x
  3. Step 3: Cross multiply
    100,950.42x = 139,309.83 × 58,512.90
  4. Step 4: Simplify right side
    100,950.42x = 8,151,422,151.81
  5. Step 5: Solve for x
    x = 8,151,422,151.81/100,950.42
  6. Step 6: Final answer
    x = 80,746.79

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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.