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Finding the Fourth Proportional to 81,099, 111,911.99 and 48,430.29

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Solution

The fourth proportional to 81,099, 111,911.99 and 48,430.29 is: 66,831.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,099 : 111,911.99 = 48,430.29 : x
  2. Step 2: Convert to fraction form
    81,099/111,911.99 = 48,430.29/x
  3. Step 3: Cross multiply
    81,099x = 111,911.99 × 48,430.29
  4. Step 4: Simplify right side
    81,099x = 5,419,929,888.03
  5. Step 5: Solve for x
    x = 5,419,929,888.03/81,099
  6. Step 6: Final answer
    x = 66,831.03

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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.