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Finding the Fourth Proportional to 139,656,383.55, 192,749,261.72 and 80,955,767.79

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Solution

The fourth proportional to 139,656,383.55, 192,749,261.72 and 80,955,767.79 is: 111,732,554.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,656,383.55 : 192,749,261.72 = 80,955,767.79 : x
  2. Step 2: Convert to fraction form
    139,656,383.55/192,749,261.72 = 80,955,767.79/x
  3. Step 3: Cross multiply
    139,656,383.55x = 192,749,261.72 × 80,955,767.79
  4. Step 4: Simplify right side
    139,656,383.55x = 15,604,164,473,093,478
  5. Step 5: Solve for x
    x = 15,604,164,473,093,478/139,656,383.55
  6. Step 6: Final answer
    x = 111,732,554.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.