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Finding the Fourth Proportional to 138,772.35, 208,019.70 and 63,946.53

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Solution

The fourth proportional to 138,772.35, 208,019.70 and 63,946.53 is: 95,855.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,772.35 : 208,019.70 = 63,946.53 : x
  2. Step 2: Convert to fraction form
    138,772.35/208,019.70 = 63,946.53/x
  3. Step 3: Cross multiply
    138,772.35x = 208,019.70 × 63,946.53
  4. Step 4: Simplify right side
    138,772.35x = 13,302,137,986.64
  5. Step 5: Solve for x
    x = 13,302,137,986.64/138,772.35
  6. Step 6: Final answer
    x = 95,855.82

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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.