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Finding the Fourth Proportional to 139,852.84, 193,001.88 and 79,421.80

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Solution

The fourth proportional to 139,852.84, 193,001.88 and 79,421.80 is: 109,604.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,852.84 : 193,001.88 = 79,421.80 : x
  2. Step 2: Convert to fraction form
    139,852.84/193,001.88 = 79,421.80/x
  3. Step 3: Cross multiply
    139,852.84x = 193,001.88 × 79,421.80
  4. Step 4: Simplify right side
    139,852.84x = 15,328,556,712.98
  5. Step 5: Solve for x
    x = 15,328,556,712.98/139,852.84
  6. Step 6: Final answer
    x = 109,604.90

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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.