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Finding the Fourth Proportional to 86,950.41, 120,605.45 and 84,645.86

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Solution

The fourth proportional to 86,950.41, 120,605.45 and 84,645.86 is: 117,408.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,950.41 : 120,605.45 = 84,645.86 : x
  2. Step 2: Convert to fraction form
    86,950.41/120,605.45 = 84,645.86/x
  3. Step 3: Cross multiply
    86,950.41x = 120,605.45 × 84,645.86
  4. Step 4: Simplify right side
    86,950.41x = 10,208,752,549.07
  5. Step 5: Solve for x
    x = 10,208,752,549.07/86,950.41
  6. Step 6: Final answer
    x = 117,408.91

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.