Home / 281,457.36-422,212-91,918.72

Finding the Fourth Proportional to 281,457.36, 422,212 and 91,918.72

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Solution

The fourth proportional to 281,457.36, 422,212 and 91,918.72 is: 137,886.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,457.36 : 422,212 = 91,918.72 : x
  2. Step 2: Convert to fraction form
    281,457.36/422,212 = 91,918.72/x
  3. Step 3: Cross multiply
    281,457.36x = 422,212 × 91,918.72
  4. Step 4: Simplify right side
    281,457.36x = 38,809,184,497.58
  5. Step 5: Solve for x
    x = 38,809,184,497.58/281,457.36
  6. Step 6: Final answer
    x = 137,886.55

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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.