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Finding the Fourth Proportional to 139,023.35, 191,853.59 and 75,360.99

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Solution

The fourth proportional to 139,023.35, 191,853.59 and 75,360.99 is: 103,998.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,023.35 : 191,853.59 = 75,360.99 : x
  2. Step 2: Convert to fraction form
    139,023.35/191,853.59 = 75,360.99/x
  3. Step 3: Cross multiply
    139,023.35x = 191,853.59 × 75,360.99
  4. Step 4: Simplify right side
    139,023.35x = 14,458,276,100.65
  5. Step 5: Solve for x
    x = 14,458,276,100.65/139,023.35
  6. Step 6: Final answer
    x = 103,998.91

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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.