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Finding the Fourth Proportional to 339,603.88, 509,512.50 and 140,018.20

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Solution

The fourth proportional to 339,603.88, 509,512.50 and 140,018.20 is: 210,071.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,603.88 : 509,512.50 = 140,018.20 : x
  2. Step 2: Convert to fraction form
    339,603.88/509,512.50 = 140,018.20/x
  3. Step 3: Cross multiply
    339,603.88x = 509,512.50 × 140,018.20
  4. Step 4: Simplify right side
    339,603.88x = 71,341,023,127.50
  5. Step 5: Solve for x
    x = 71,341,023,127.50/339,603.88
  6. Step 6: Final answer
    x = 210,071.28

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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.