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Finding the Fourth Proportional to 193,368.90, 289,756.67 and 80,987.63

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Solution

The fourth proportional to 193,368.90, 289,756.67 and 80,987.63 is: 121,357.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,368.90 : 289,756.67 = 80,987.63 : x
  2. Step 2: Convert to fraction form
    193,368.90/289,756.67 = 80,987.63/x
  3. Step 3: Cross multiply
    193,368.90x = 289,756.67 × 80,987.63
  4. Step 4: Simplify right side
    193,368.90x = 23,466,704,126.27
  5. Step 5: Solve for x
    x = 23,466,704,126.27/193,368.90
  6. Step 6: Final answer
    x = 121,357.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.