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Finding the Fourth Proportional to 115,328.70, 158,917.41 and 85,066.11

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Solution

The fourth proportional to 115,328.70, 158,917.41 and 85,066.11 is: 117,217.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,328.70 : 158,917.41 = 85,066.11 : x
  2. Step 2: Convert to fraction form
    115,328.70/158,917.41 = 85,066.11/x
  3. Step 3: Cross multiply
    115,328.70x = 158,917.41 × 85,066.11
  4. Step 4: Simplify right side
    115,328.70x = 13,518,485,879.98
  5. Step 5: Solve for x
    x = 13,518,485,879.98/115,328.70
  6. Step 6: Final answer
    x = 117,217.01

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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.