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Finding the Fourth Proportional to 253,009.32, 379,513.84 and 66,020.82

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Solution

The fourth proportional to 253,009.32, 379,513.84 and 66,020.82 is: 99,031.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,009.32 : 379,513.84 = 66,020.82 : x
  2. Step 2: Convert to fraction form
    253,009.32/379,513.84 = 66,020.82/x
  3. Step 3: Cross multiply
    253,009.32x = 379,513.84 × 66,020.82
  4. Step 4: Simplify right side
    253,009.32x = 25,055,814,918.15
  5. Step 5: Solve for x
    x = 25,055,814,918.15/253,009.32
  6. Step 6: Final answer
    x = 99,031.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.