Home / 86,986.61-120,039.48-51,178.94

Finding the Fourth Proportional to 86,986.61, 120,039.48 and 51,178.94

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Solution

The fourth proportional to 86,986.61, 120,039.48 and 51,178.94 is: 70,625.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,986.61 : 120,039.48 = 51,178.94 : x
  2. Step 2: Convert to fraction form
    86,986.61/120,039.48 = 51,178.94/x
  3. Step 3: Cross multiply
    86,986.61x = 120,039.48 × 51,178.94
  4. Step 4: Simplify right side
    86,986.61x = 6,143,492,744.35
  5. Step 5: Solve for x
    x = 6,143,492,744.35/86,986.61
  6. Step 6: Final answer
    x = 70,625.73

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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.