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Finding the Fourth Proportional to 139,050.57, 191,891.12 and 75,388.53

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Solution

The fourth proportional to 139,050.57, 191,891.12 and 75,388.53 is: 104,036.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,050.57 : 191,891.12 = 75,388.53 : x
  2. Step 2: Convert to fraction form
    139,050.57/191,891.12 = 75,388.53/x
  3. Step 3: Cross multiply
    139,050.57x = 191,891.12 × 75,388.53
  4. Step 4: Simplify right side
    139,050.57x = 14,466,389,079.91
  5. Step 5: Solve for x
    x = 14,466,389,079.91/139,050.57
  6. Step 6: Final answer
    x = 104,036.89

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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.