Home / 86,628.21-129,987.85-61,489.95

Finding the Fourth Proportional to 86,628.21, 129,987.85 and 61,489.95

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Solution

The fourth proportional to 86,628.21, 129,987.85 and 61,489.95 is: 92,267.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,628.21 : 129,987.85 = 61,489.95 : x
  2. Step 2: Convert to fraction form
    86,628.21/129,987.85 = 61,489.95/x
  3. Step 3: Cross multiply
    86,628.21x = 129,987.85 × 61,489.95
  4. Step 4: Simplify right side
    86,628.21x = 7,992,945,871.22
  5. Step 5: Solve for x
    x = 7,992,945,871.22/86,628.21
  6. Step 6: Final answer
    x = 92,267.24

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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.