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Finding the Fourth Proportional to 86,809, 119,582.10 and 74,020.54

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Solution

The fourth proportional to 86,809, 119,582.10 and 74,020.54 is: 101,965.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,809 : 119,582.10 = 74,020.54 : x
  2. Step 2: Convert to fraction form
    86,809/119,582.10 = 74,020.54/x
  3. Step 3: Cross multiply
    86,809x = 119,582.10 × 74,020.54
  4. Step 4: Simplify right side
    86,809x = 8,851,531,616.33
  5. Step 5: Solve for x
    x = 8,851,531,616.33/86,809
  6. Step 6: Final answer
    x = 101,965.60

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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.