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Finding the Fourth Proportional to 121,469.51, 181,830.44 and 79,258.79

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Solution

The fourth proportional to 121,469.51, 181,830.44 and 79,258.79 is: 118,644.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,469.51 : 181,830.44 = 79,258.79 : x
  2. Step 2: Convert to fraction form
    121,469.51/181,830.44 = 79,258.79/x
  3. Step 3: Cross multiply
    121,469.51x = 181,830.44 × 79,258.79
  4. Step 4: Simplify right side
    121,469.51x = 14,411,659,354.12
  5. Step 5: Solve for x
    x = 14,411,659,354.12/121,469.51
  6. Step 6: Final answer
    x = 118,644.26

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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.