Home / 78,389.83-117,584.75-25,814.35

Finding the Fourth Proportional to 78,389.83, 117,584.75 and 25,814.35

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Solution

The fourth proportional to 78,389.83, 117,584.75 and 25,814.35 is: 38,721.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,389.83 : 117,584.75 = 25,814.35 : x
  2. Step 2: Convert to fraction form
    78,389.83/117,584.75 = 25,814.35/x
  3. Step 3: Cross multiply
    78,389.83x = 117,584.75 × 25,814.35
  4. Step 4: Simplify right side
    78,389.83x = 3,035,373,891.16
  5. Step 5: Solve for x
    x = 3,035,373,891.16/78,389.83
  6. Step 6: Final answer
    x = 38,721.53

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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.