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Finding the Fourth Proportional to 512,017.75, 768,026.64 and 138,040.75

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Solution

The fourth proportional to 512,017.75, 768,026.64 and 138,040.75 is: 207,061.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,017.75 : 768,026.64 = 138,040.75 : x
  2. Step 2: Convert to fraction form
    512,017.75/768,026.64 = 138,040.75/x
  3. Step 3: Cross multiply
    512,017.75x = 768,026.64 × 138,040.75
  4. Step 4: Simplify right side
    512,017.75x = 106,018,973,405.58
  5. Step 5: Solve for x
    x = 106,018,973,405.58/512,017.75
  6. Step 6: Final answer
    x = 207,061.13

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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.