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Finding the Fourth Proportional to 139,306.36, 208,994.91 and 64,480.48

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Solution

The fourth proportional to 139,306.36, 208,994.91 and 64,480.48 is: 96,737.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,306.36 : 208,994.91 = 64,480.48 : x
  2. Step 2: Convert to fraction form
    139,306.36/208,994.91 = 64,480.48/x
  3. Step 3: Cross multiply
    139,306.36x = 208,994.91 × 64,480.48
  4. Step 4: Simplify right side
    139,306.36x = 13,476,092,114.36
  5. Step 5: Solve for x
    x = 13,476,092,114.36/139,306.36
  6. Step 6: Final answer
    x = 96,737.09

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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.