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Finding the Fourth Proportional to 139,281.35, 192,208.25 and 75,619.16

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Solution

The fourth proportional to 139,281.35, 192,208.25 and 75,619.16 is: 104,354.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,281.35 : 192,208.25 = 75,619.16 : x
  2. Step 2: Convert to fraction form
    139,281.35/192,208.25 = 75,619.16/x
  3. Step 3: Cross multiply
    139,281.35x = 192,208.25 × 75,619.16
  4. Step 4: Simplify right side
    139,281.35x = 14,534,625,070.93
  5. Step 5: Solve for x
    x = 14,534,625,070.93/139,281.35
  6. Step 6: Final answer
    x = 104,354.43

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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.