Home / 78,584.49-117,875.57-19,420.15

Finding the Fourth Proportional to 78,584.49, 117,875.57 and 19,420.15

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Solution

The fourth proportional to 78,584.49, 117,875.57 and 19,420.15 is: 29,129.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,584.49 : 117,875.57 = 19,420.15 : x
  2. Step 2: Convert to fraction form
    78,584.49/117,875.57 = 19,420.15/x
  3. Step 3: Cross multiply
    78,584.49x = 117,875.57 × 19,420.15
  4. Step 4: Simplify right side
    78,584.49x = 2,289,161,593.97
  5. Step 5: Solve for x
    x = 2,289,161,593.97/78,584.49
  6. Step 6: Final answer
    x = 29,129.94

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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.