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Finding the Fourth Proportional to 221,408.16, 305,550 and 125,928.60

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Solution

The fourth proportional to 221,408.16, 305,550 and 125,928.60 is: 173,785.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,408.16 : 305,550 = 125,928.60 : x
  2. Step 2: Convert to fraction form
    221,408.16/305,550 = 125,928.60/x
  3. Step 3: Cross multiply
    221,408.16x = 305,550 × 125,928.60
  4. Step 4: Simplify right side
    221,408.16x = 38,477,483,730
  5. Step 5: Solve for x
    x = 38,477,483,730/221,408.16
  6. Step 6: Final answer
    x = 173,785.30

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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.