Home / 145,839.47-201,258.60-78,771.47

Finding the Fourth Proportional to 145,839.47, 201,258.60 and 78,771.47

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Solution

The fourth proportional to 145,839.47, 201,258.60 and 78,771.47 is: 108,704.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,839.47 : 201,258.60 = 78,771.47 : x
  2. Step 2: Convert to fraction form
    145,839.47/201,258.60 = 78,771.47/x
  3. Step 3: Cross multiply
    145,839.47x = 201,258.60 × 78,771.47
  4. Step 4: Simplify right side
    145,839.47x = 15,853,434,765.85
  5. Step 5: Solve for x
    x = 15,853,434,765.85/145,839.47
  6. Step 6: Final answer
    x = 108,704.70

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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.