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Finding the Fourth Proportional to 202,465.70, 279,390.40 and 121,919.30

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Solution

The fourth proportional to 202,465.70, 279,390.40 and 121,919.30 is: 168,241.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,465.70 : 279,390.40 = 121,919.30 : x
  2. Step 2: Convert to fraction form
    202,465.70/279,390.40 = 121,919.30/x
  3. Step 3: Cross multiply
    202,465.70x = 279,390.40 × 121,919.30
  4. Step 4: Simplify right side
    202,465.70x = 34,063,081,994.72
  5. Step 5: Solve for x
    x = 34,063,081,994.72/202,465.70
  6. Step 6: Final answer
    x = 168,241.25

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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.