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Finding the Fourth Proportional to 139,319.19, 192,260.52 and 75,656.97

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Solution

The fourth proportional to 139,319.19, 192,260.52 and 75,656.97 is: 104,406.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,319.19 : 192,260.52 = 75,656.97 : x
  2. Step 2: Convert to fraction form
    139,319.19/192,260.52 = 75,656.97/x
  3. Step 3: Cross multiply
    139,319.19x = 192,260.52 × 75,656.97
  4. Step 4: Simplify right side
    139,319.19x = 14,545,848,393.82
  5. Step 5: Solve for x
    x = 14,545,848,393.82/139,319.19
  6. Step 6: Final answer
    x = 104,406.64

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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.