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Finding the Fourth Proportional to 115,370.40, 173,055.60 and 85,845.90

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Solution

The fourth proportional to 115,370.40, 173,055.60 and 85,845.90 is: 128,768.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,370.40 : 173,055.60 = 85,845.90 : x
  2. Step 2: Convert to fraction form
    115,370.40/173,055.60 = 85,845.90/x
  3. Step 3: Cross multiply
    115,370.40x = 173,055.60 × 85,845.90
  4. Step 4: Simplify right side
    115,370.40x = 14,856,113,732.04
  5. Step 5: Solve for x
    x = 14,856,113,732.04/115,370.40
  6. Step 6: Final answer
    x = 128,768.85

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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.