Home / 138,636.49-191,327.22-78,185.08

Finding the Fourth Proportional to 138,636.49, 191,327.22 and 78,185.08

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Solution

The fourth proportional to 138,636.49, 191,327.22 and 78,185.08 is: 107,900.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,636.49 : 191,327.22 = 78,185.08 : x
  2. Step 2: Convert to fraction form
    138,636.49/191,327.22 = 78,185.08/x
  3. Step 3: Cross multiply
    138,636.49x = 191,327.22 × 78,185.08
  4. Step 4: Simplify right side
    138,636.49x = 14,958,933,645.05
  5. Step 5: Solve for x
    x = 14,958,933,645.05/138,636.49
  6. Step 6: Final answer
    x = 107,900.40

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1.5x scale

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.