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Finding the Fourth Proportional to 139,335.51, 192,284.42 and 75,674.55

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Solution

The fourth proportional to 139,335.51, 192,284.42 and 75,674.55 is: 104,431.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,335.51 : 192,284.42 = 75,674.55 : x
  2. Step 2: Convert to fraction form
    139,335.51/192,284.42 = 75,674.55/x
  3. Step 3: Cross multiply
    139,335.51x = 192,284.42 × 75,674.55
  4. Step 4: Simplify right side
    139,335.51x = 14,551,036,577.14
  5. Step 5: Solve for x
    x = 14,551,036,577.14/139,335.51
  6. Step 6: Final answer
    x = 104,431.65

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1.5x scale

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.