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Finding the Fourth Proportional to 202,561.71, 279,533.52 and 111,917.40

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Solution

The fourth proportional to 202,561.71, 279,533.52 and 111,917.40 is: 154,445.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,561.71 : 279,533.52 = 111,917.40 : x
  2. Step 2: Convert to fraction form
    202,561.71/279,533.52 = 111,917.40/x
  3. Step 3: Cross multiply
    202,561.71x = 279,533.52 × 111,917.40
  4. Step 4: Simplify right side
    202,561.71x = 31,284,664,771.25
  5. Step 5: Solve for x
    x = 31,284,664,771.25/202,561.71
  6. Step 6: Final answer
    x = 154,445.11

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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.