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Finding the Fourth Proportional to 139,153.43, 208,559.14 and 64,169.51

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Solution

The fourth proportional to 139,153.43, 208,559.14 and 64,169.51 is: 96,175.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,153.43 : 208,559.14 = 64,169.51 : x
  2. Step 2: Convert to fraction form
    139,153.43/208,559.14 = 64,169.51/x
  3. Step 3: Cross multiply
    139,153.43x = 208,559.14 × 64,169.51
  4. Step 4: Simplify right side
    139,153.43x = 13,383,136,616.60
  5. Step 5: Solve for x
    x = 13,383,136,616.60/139,153.43
  6. Step 6: Final answer
    x = 96,175.40

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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.