Home / 145,839.25-201,258.30-78,771.25

Finding the Fourth Proportional to 145,839.25, 201,258.30 and 78,771.25

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Solution

The fourth proportional to 145,839.25, 201,258.30 and 78,771.25 is: 108,704.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,839.25 : 201,258.30 = 78,771.25 : x
  2. Step 2: Convert to fraction form
    145,839.25/201,258.30 = 78,771.25/x
  3. Step 3: Cross multiply
    145,839.25x = 201,258.30 × 78,771.25
  4. Step 4: Simplify right side
    145,839.25x = 15,853,367,863.88
  5. Step 5: Solve for x
    x = 15,853,367,863.88/145,839.25
  6. Step 6: Final answer
    x = 108,704.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.