Home / 103,677.35-155,680.05-78,745.55

Finding the Fourth Proportional to 103,677.35, 155,680.05 and 78,745.55

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Solution

The fourth proportional to 103,677.35, 155,680.05 and 78,745.55 is: 118,242.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,677.35 : 155,680.05 = 78,745.55 : x
  2. Step 2: Convert to fraction form
    103,677.35/155,680.05 = 78,745.55/x
  3. Step 3: Cross multiply
    103,677.35x = 155,680.05 × 78,745.55
  4. Step 4: Simplify right side
    103,677.35x = 12,259,111,161.28
  5. Step 5: Solve for x
    x = 12,259,111,161.28/103,677.35
  6. Step 6: Final answer
    x = 118,242.91

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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.