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Finding the Fourth Proportional to 78,518.53, 117,738.37 and 36,362.35

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Solution

The fourth proportional to 78,518.53, 117,738.37 and 36,362.35 is: 54,525.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,518.53 : 117,738.37 = 36,362.35 : x
  2. Step 2: Convert to fraction form
    78,518.53/117,738.37 = 36,362.35/x
  3. Step 3: Cross multiply
    78,518.53x = 117,738.37 × 36,362.35
  4. Step 4: Simplify right side
    78,518.53x = 4,281,243,138.77
  5. Step 5: Solve for x
    x = 4,281,243,138.77/78,518.53
  6. Step 6: Final answer
    x = 54,525.26

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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.