Home / 137,408.40-205,653.33-78,228.18

Finding the Fourth Proportional to 137,408.40, 205,653.33 and 78,228.18

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Solution

The fourth proportional to 137,408.40, 205,653.33 and 78,228.18 is: 117,080.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,408.40 : 205,653.33 = 78,228.18 : x
  2. Step 2: Convert to fraction form
    137,408.40/205,653.33 = 78,228.18/x
  3. Step 3: Cross multiply
    137,408.40x = 205,653.33 × 78,228.18
  4. Step 4: Simplify right side
    137,408.40x = 16,087,885,716.84
  5. Step 5: Solve for x
    x = 16,087,885,716.84/137,408.40
  6. Step 6: Final answer
    x = 117,080.80

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1.5x scale

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.