Home / 81,259.72-111,889.08-71,131.48

Finding the Fourth Proportional to 81,259.72, 111,889.08 and 71,131.48

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Solution

The fourth proportional to 81,259.72, 111,889.08 and 71,131.48 is: 97,943.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,259.72 : 111,889.08 = 71,131.48 : x
  2. Step 2: Convert to fraction form
    81,259.72/111,889.08 = 71,131.48/x
  3. Step 3: Cross multiply
    81,259.72x = 111,889.08 × 71,131.48
  4. Step 4: Simplify right side
    81,259.72x = 7,958,835,856.24
  5. Step 5: Solve for x
    x = 7,958,835,856.24/81,259.72
  6. Step 6: Final answer
    x = 97,943.19

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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.