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Finding the Fourth Proportional to 139,422.64, 192,403.56 and 75,759.04

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Solution

The fourth proportional to 139,422.64, 192,403.56 and 75,759.04 is: 104,547.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,422.64 : 192,403.56 = 75,759.04 : x
  2. Step 2: Convert to fraction form
    139,422.64/192,403.56 = 75,759.04/x
  3. Step 3: Cross multiply
    139,422.64x = 192,403.56 × 75,759.04
  4. Step 4: Simplify right side
    139,422.64x = 14,576,308,998.18
  5. Step 5: Solve for x
    x = 14,576,308,998.18/139,422.64
  6. Step 6: Final answer
    x = 104,547.65

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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.