Home / 138,968.67-191,706.34-87,895.39

Finding the Fourth Proportional to 138,968.67, 191,706.34 and 87,895.39

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Solution

The fourth proportional to 138,968.67, 191,706.34 and 87,895.39 is: 121,251.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,968.67 : 191,706.34 = 87,895.39 : x
  2. Step 2: Convert to fraction form
    138,968.67/191,706.34 = 87,895.39/x
  3. Step 3: Cross multiply
    138,968.67x = 191,706.34 × 87,895.39
  4. Step 4: Simplify right side
    138,968.67x = 16,850,103,519.77
  5. Step 5: Solve for x
    x = 16,850,103,519.77/138,968.67
  6. Step 6: Final answer
    x = 121,251.10

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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.