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Finding the Fourth Proportional to 78,368.49, 108,173.07 and 50,074.11

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Solution

The fourth proportional to 78,368.49, 108,173.07 and 50,074.11 is: 69,117.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,368.49 : 108,173.07 = 50,074.11 : x
  2. Step 2: Convert to fraction form
    78,368.49/108,173.07 = 50,074.11/x
  3. Step 3: Cross multiply
    78,368.49x = 108,173.07 × 50,074.11
  4. Step 4: Simplify right side
    78,368.49x = 5,416,670,206.22
  5. Step 5: Solve for x
    x = 5,416,670,206.22/78,368.49
  6. Step 6: Final answer
    x = 69,117.96

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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.