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Finding the Fourth Proportional to 118,980.99, 164,171.03 and 68,009.87

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Solution

The fourth proportional to 118,980.99, 164,171.03 and 68,009.87 is: 93,840.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,980.99 : 164,171.03 = 68,009.87 : x
  2. Step 2: Convert to fraction form
    118,980.99/164,171.03 = 68,009.87/x
  3. Step 3: Cross multiply
    118,980.99x = 164,171.03 × 68,009.87
  4. Step 4: Simplify right side
    118,980.99x = 11,165,249,247.16
  5. Step 5: Solve for x
    x = 11,165,249,247.16/118,980.99
  6. Step 6: Final answer
    x = 93,840.61

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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.