Home / 86,986.34-120,039.08-51,178.66

Finding the Fourth Proportional to 86,986.34, 120,039.08 and 51,178.66

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Solution

The fourth proportional to 86,986.34, 120,039.08 and 51,178.66 is: 70,625.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,986.34 : 120,039.08 = 51,178.66 : x
  2. Step 2: Convert to fraction form
    86,986.34/120,039.08 = 51,178.66/x
  3. Step 3: Cross multiply
    86,986.34x = 120,039.08 × 51,178.66
  4. Step 4: Simplify right side
    86,986.34x = 6,143,439,262.03
  5. Step 5: Solve for x
    x = 6,143,439,262.03/86,986.34
  6. Step 6: Final answer
    x = 70,625.33

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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.