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Finding the Fourth Proportional to 216,635.60, 298,955.08 and 121,141.20

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Solution

The fourth proportional to 216,635.60, 298,955.08 and 121,141.20 is: 167,173.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,635.60 : 298,955.08 = 121,141.20 : x
  2. Step 2: Convert to fraction form
    216,635.60/298,955.08 = 121,141.20/x
  3. Step 3: Cross multiply
    216,635.60x = 298,955.08 × 121,141.20
  4. Step 4: Simplify right side
    216,635.60x = 36,215,777,137.30
  5. Step 5: Solve for x
    x = 36,215,777,137.30/216,635.60
  6. Step 6: Final answer
    x = 167,173.71

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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.