Home / 78,468.39-117,685.98-25,865.37

Finding the Fourth Proportional to 78,468.39, 117,685.98 and 25,865.37

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Solution

The fourth proportional to 78,468.39, 117,685.98 and 25,865.37 is: 38,792.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,468.39 : 117,685.98 = 25,865.37 : x
  2. Step 2: Convert to fraction form
    78,468.39/117,685.98 = 25,865.37/x
  3. Step 3: Cross multiply
    78,468.39x = 117,685.98 × 25,865.37
  4. Step 4: Simplify right side
    78,468.39x = 3,043,991,416.51
  5. Step 5: Solve for x
    x = 3,043,991,416.51/78,468.39
  6. Step 6: Final answer
    x = 38,792.58

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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.