Home / 78,132.49-117,151.48-30,690.79

Finding the Fourth Proportional to 78,132.49, 117,151.48 and 30,690.79

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Solution

The fourth proportional to 78,132.49, 117,151.48 and 30,690.79 is: 46,017.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,132.49 : 117,151.48 = 30,690.79 : x
  2. Step 2: Convert to fraction form
    78,132.49/117,151.48 = 30,690.79/x
  3. Step 3: Cross multiply
    78,132.49x = 117,151.48 × 30,690.79
  4. Step 4: Simplify right side
    78,132.49x = 3,595,471,470.87
  5. Step 5: Solve for x
    x = 3,595,471,470.87/78,132.49
  6. Step 6: Final answer
    x = 46,017.62

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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.