Home / 86,723.15-129,991.41-56,726.09

Finding the Fourth Proportional to 86,723.15, 129,991.41 and 56,726.09

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Solution

The fourth proportional to 86,723.15, 129,991.41 and 56,726.09 is: 85,028.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,723.15 : 129,991.41 = 56,726.09 : x
  2. Step 2: Convert to fraction form
    86,723.15/129,991.41 = 56,726.09/x
  3. Step 3: Cross multiply
    86,723.15x = 129,991.41 × 56,726.09
  4. Step 4: Simplify right side
    86,723.15x = 7,373,904,422.89
  5. Step 5: Solve for x
    x = 7,373,904,422.89/86,723.15
  6. Step 6: Final answer
    x = 85,028.10

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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.