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Finding the Fourth Proportional to 202,818.68, 279,888 and 112,181.28

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Solution

The fourth proportional to 202,818.68, 279,888 and 112,181.28 is: 154,809.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,818.68 : 279,888 = 112,181.28 : x
  2. Step 2: Convert to fraction form
    202,818.68/279,888 = 112,181.28/x
  3. Step 3: Cross multiply
    202,818.68x = 279,888 × 112,181.28
  4. Step 4: Simplify right side
    202,818.68x = 31,398,194,096.64
  5. Step 5: Solve for x
    x = 31,398,194,096.64/202,818.68
  6. Step 6: Final answer
    x = 154,809.18

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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.