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Finding the Fourth Proportional to 78,787, 118,114.21 and 36,645.67

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Solution

The fourth proportional to 78,787, 118,114.21 and 36,645.67 is: 54,937.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,787 : 118,114.21 = 36,645.67 : x
  2. Step 2: Convert to fraction form
    78,787/118,114.21 = 36,645.67/x
  3. Step 3: Cross multiply
    78,787x = 118,114.21 × 36,645.67
  4. Step 4: Simplify right side
    78,787x = 4,328,374,361.97
  5. Step 5: Solve for x
    x = 4,328,374,361.97/78,787
  6. Step 6: Final answer
    x = 54,937.67

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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.