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Finding the Fourth Proportional to 216,626.81, 298,945.89 and 121,133.48

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Solution

The fourth proportional to 216,626.81, 298,945.89 and 121,133.48 is: 167,164.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,626.81 : 298,945.89 = 121,133.48 : x
  2. Step 2: Convert to fraction form
    216,626.81/298,945.89 = 121,133.48/x
  3. Step 3: Cross multiply
    216,626.81x = 298,945.89 × 121,133.48
  4. Step 4: Simplify right side
    216,626.81x = 36,212,354,492.67
  5. Step 5: Solve for x
    x = 36,212,354,492.67/216,626.81
  6. Step 6: Final answer
    x = 167,164.70

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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.