Home / 78,456.43-117,683.62-19,292.61

Finding the Fourth Proportional to 78,456.43, 117,683.62 and 19,292.61

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Solution

The fourth proportional to 78,456.43, 117,683.62 and 19,292.61 is: 28,938.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,456.43 : 117,683.62 = 19,292.61 : x
  2. Step 2: Convert to fraction form
    78,456.43/117,683.62 = 19,292.61/x
  3. Step 3: Cross multiply
    78,456.43x = 117,683.62 × 19,292.61
  4. Step 4: Simplify right side
    78,456.43x = 2,270,424,087.59
  5. Step 5: Solve for x
    x = 2,270,424,087.59/78,456.43
  6. Step 6: Final answer
    x = 28,938.66

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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.