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Finding the Fourth Proportional to 216,860.76, 299,241 and 121,343.40

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Solution

The fourth proportional to 216,860.76, 299,241 and 121,343.40 is: 167,438.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,860.76 : 299,241 = 121,343.40 : x
  2. Step 2: Convert to fraction form
    216,860.76/299,241 = 121,343.40/x
  3. Step 3: Cross multiply
    216,860.76x = 299,241 × 121,343.40
  4. Step 4: Simplify right side
    216,860.76x = 36,310,920,359.40
  5. Step 5: Solve for x
    x = 36,310,920,359.40/216,860.76
  6. Step 6: Final answer
    x = 167,438.87

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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.