Home / 190,991.37-286,388.51-85,720.26

Finding the Fourth Proportional to 190,991.37, 286,388.51 and 85,720.26

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Solution

The fourth proportional to 190,991.37, 286,388.51 and 85,720.26 is: 128,536.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,991.37 : 286,388.51 = 85,720.26 : x
  2. Step 2: Convert to fraction form
    190,991.37/286,388.51 = 85,720.26/x
  3. Step 3: Cross multiply
    190,991.37x = 286,388.51 × 85,720.26
  4. Step 4: Simplify right side
    190,991.37x = 24,549,297,109.61
  5. Step 5: Solve for x
    x = 24,549,297,109.61/190,991.37
  6. Step 6: Final answer
    x = 128,536.16

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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.