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Finding the Fourth Proportional to 216,886.11, 299,302.78 and 121,392.80

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Solution

The fourth proportional to 216,886.11, 299,302.78 and 121,392.80 is: 167,522.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,886.11 : 299,302.78 = 121,392.80 : x
  2. Step 2: Convert to fraction form
    216,886.11/299,302.78 = 121,392.80/x
  3. Step 3: Cross multiply
    216,886.11x = 299,302.78 × 121,392.80
  4. Step 4: Simplify right side
    216,886.11x = 36,333,202,511.98
  5. Step 5: Solve for x
    x = 36,333,202,511.98/216,886.11
  6. Step 6: Final answer
    x = 167,522.04

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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.