Home / 100,971.72-139,334.70-55,647.16

Finding the Fourth Proportional to 100,971.72, 139,334.70 and 55,647.16

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Solution

The fourth proportional to 100,971.72, 139,334.70 and 55,647.16 is: 76,789.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,971.72 : 139,334.70 = 55,647.16 : x
  2. Step 2: Convert to fraction form
    100,971.72/139,334.70 = 55,647.16/x
  3. Step 3: Cross multiply
    100,971.72x = 139,334.70 × 55,647.16
  4. Step 4: Simplify right side
    100,971.72x = 7,753,580,344.45
  5. Step 5: Solve for x
    x = 7,753,580,344.45/100,971.72
  6. Step 6: Final answer
    x = 76,789.62

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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.