Home / 138,131.05-190,617.69-84,415.90

Finding the Fourth Proportional to 138,131.05, 190,617.69 and 84,415.90

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Solution

The fourth proportional to 138,131.05, 190,617.69 and 84,415.90 is: 116,492.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,131.05 : 190,617.69 = 84,415.90 : x
  2. Step 2: Convert to fraction form
    138,131.05/190,617.69 = 84,415.90/x
  3. Step 3: Cross multiply
    138,131.05x = 190,617.69 × 84,415.90
  4. Step 4: Simplify right side
    138,131.05x = 16,091,163,857.27
  5. Step 5: Solve for x
    x = 16,091,163,857.27/138,131.05
  6. Step 6: Final answer
    x = 116,492.01

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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.