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Finding the Fourth Proportional to 202,181.60, 279,009.81 and 111,543.20

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Solution

The fourth proportional to 202,181.60, 279,009.81 and 111,543.20 is: 153,929.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,181.60 : 279,009.81 = 111,543.20 : x
  2. Step 2: Convert to fraction form
    202,181.60/279,009.81 = 111,543.20/x
  3. Step 3: Cross multiply
    202,181.60x = 279,009.81 × 111,543.20
  4. Step 4: Simplify right side
    202,181.60x = 31,121,647,038.79
  5. Step 5: Solve for x
    x = 31,121,647,038.79/202,181.60
  6. Step 6: Final answer
    x = 153,929.18

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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.