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Finding the Fourth Proportional to 78,669, 117,975.69 and 25,358.81

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Solution

The fourth proportional to 78,669, 117,975.69 and 25,358.81 is: 38,029.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,669 : 117,975.69 = 25,358.81 : x
  2. Step 2: Convert to fraction form
    78,669/117,975.69 = 25,358.81/x
  3. Step 3: Cross multiply
    78,669x = 117,975.69 × 25,358.81
  4. Step 4: Simplify right side
    78,669x = 2,991,722,517.45
  5. Step 5: Solve for x
    x = 2,991,722,517.45/78,669
  6. Step 6: Final answer
    x = 38,029.24

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1.5x scale

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.