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Finding the Fourth Proportional to 216,718.50, 299,084.79 and 121,231.62

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Solution

The fourth proportional to 216,718.50, 299,084.79 and 121,231.62 is: 167,307.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,718.50 : 299,084.79 = 121,231.62 : x
  2. Step 2: Convert to fraction form
    216,718.50/299,084.79 = 121,231.62/x
  3. Step 3: Cross multiply
    216,718.50x = 299,084.79 × 121,231.62
  4. Step 4: Simplify right side
    216,718.50x = 36,258,533,609.06
  5. Step 5: Solve for x
    x = 36,258,533,609.06/216,718.50
  6. Step 6: Final answer
    x = 167,307.05

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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.