Home / 86,415.72-129,399.26-74,015.56

Finding the Fourth Proportional to 86,415.72, 129,399.26 and 74,015.56

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Solution

The fourth proportional to 86,415.72, 129,399.26 and 74,015.56 is: 110,831.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,415.72 : 129,399.26 = 74,015.56 : x
  2. Step 2: Convert to fraction form
    86,415.72/129,399.26 = 74,015.56/x
  3. Step 3: Cross multiply
    86,415.72x = 129,399.26 × 74,015.56
  4. Step 4: Simplify right side
    86,415.72x = 9,577,558,692.49
  5. Step 5: Solve for x
    x = 9,577,558,692.49/86,415.72
  6. Step 6: Final answer
    x = 110,831.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.