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Finding the Fourth Proportional to 78,696.20, 108,600.34 and 45,173

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Solution

The fourth proportional to 78,696.20, 108,600.34 and 45,173 is: 62,338.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,696.20 : 108,600.34 = 45,173 : x
  2. Step 2: Convert to fraction form
    78,696.20/108,600.34 = 45,173/x
  3. Step 3: Cross multiply
    78,696.20x = 108,600.34 × 45,173
  4. Step 4: Simplify right side
    78,696.20x = 4,905,803,158.82
  5. Step 5: Solve for x
    x = 4,905,803,158.82/78,696.20
  6. Step 6: Final answer
    x = 62,338.50

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1.5x scale

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.