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Finding the Fourth Proportional to 121,658.67, 168,004.46 and 115,032.06

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Solution

The fourth proportional to 121,658.67, 168,004.46 and 115,032.06 is: 158,853.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,658.67 : 168,004.46 = 115,032.06 : x
  2. Step 2: Convert to fraction form
    121,658.67/168,004.46 = 115,032.06/x
  3. Step 3: Cross multiply
    121,658.67x = 168,004.46 × 115,032.06
  4. Step 4: Simplify right side
    121,658.67x = 19,325,899,410.57
  5. Step 5: Solve for x
    x = 19,325,899,410.57/121,658.67
  6. Step 6: Final answer
    x = 158,853.45

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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.