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Finding the Fourth Proportional to 78,647.62, 108,553.32 and 48,458.80

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Solution

The fourth proportional to 78,647.62, 108,553.32 and 48,458.80 is: 66,885.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,647.62 : 108,553.32 = 48,458.80 : x
  2. Step 2: Convert to fraction form
    78,647.62/108,553.32 = 48,458.80/x
  3. Step 3: Cross multiply
    78,647.62x = 108,553.32 × 48,458.80
  4. Step 4: Simplify right side
    78,647.62x = 5,260,363,623.22
  5. Step 5: Solve for x
    x = 5,260,363,623.22/78,647.62
  6. Step 6: Final answer
    x = 66,885.22

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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.