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Finding the Fourth Proportional to 121,141.83, 167,130.88 and 120,955

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Solution

The fourth proportional to 121,141.83, 167,130.88 and 120,955 is: 166,873.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,141.83 : 167,130.88 = 120,955 : x
  2. Step 2: Convert to fraction form
    121,141.83/167,130.88 = 120,955/x
  3. Step 3: Cross multiply
    121,141.83x = 167,130.88 × 120,955
  4. Step 4: Simplify right side
    121,141.83x = 20,215,315,590.40
  5. Step 5: Solve for x
    x = 20,215,315,590.40/121,141.83
  6. Step 6: Final answer
    x = 166,873.12

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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.