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Finding the Fourth Proportional to 234,078.40, 350,523.60 and 128,778.40

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Solution

The fourth proportional to 234,078.40, 350,523.60 and 128,778.40 is: 192,840.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    234,078.40 : 350,523.60 = 128,778.40 : x
  2. Step 2: Convert to fraction form
    234,078.40/350,523.60 = 128,778.40/x
  3. Step 3: Cross multiply
    234,078.40x = 350,523.60 × 128,778.40
  4. Step 4: Simplify right side
    234,078.40x = 45,139,868,370.24
  5. Step 5: Solve for x
    x = 45,139,868,370.24/234,078.40
  6. Step 6: Final answer
    x = 192,840.81

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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.