Home / 78,408.15-117,497.40-38,886.33

Finding the Fourth Proportional to 78,408.15, 117,497.40 and 38,886.33

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Solution

The fourth proportional to 78,408.15, 117,497.40 and 38,886.33 is: 58,272.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,408.15 : 117,497.40 = 38,886.33 : x
  2. Step 2: Convert to fraction form
    78,408.15/117,497.40 = 38,886.33/x
  3. Step 3: Cross multiply
    78,408.15x = 117,497.40 × 38,886.33
  4. Step 4: Simplify right side
    78,408.15x = 4,569,042,376.80
  5. Step 5: Solve for x
    x = 4,569,042,376.80/78,408.15
  6. Step 6: Final answer
    x = 58,272.55

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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.