Home / 138,533.36-191,175.74-74,871

Finding the Fourth Proportional to 138,533.36, 191,175.74 and 74,871

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Solution

The fourth proportional to 138,533.36, 191,175.74 and 74,871 is: 103,321.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,533.36 : 191,175.74 = 74,871 : x
  2. Step 2: Convert to fraction form
    138,533.36/191,175.74 = 74,871/x
  3. Step 3: Cross multiply
    138,533.36x = 191,175.74 × 74,871
  4. Step 4: Simplify right side
    138,533.36x = 14,313,519,157.10
  5. Step 5: Solve for x
    x = 14,313,519,157.10/138,533.36
  6. Step 6: Final answer
    x = 103,321.83

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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.