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Finding the Fourth Proportional to 216,886.79, 299,310.10 and 121,391.03

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Solution

The fourth proportional to 216,886.79, 299,310.10 and 121,391.03 is: 167,523.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,886.79 : 299,310.10 = 121,391.03 : x
  2. Step 2: Convert to fraction form
    216,886.79/299,310.10 = 121,391.03/x
  3. Step 3: Cross multiply
    216,886.79x = 299,310.10 × 121,391.03
  4. Step 4: Simplify right side
    216,886.79x = 36,333,559,528.37
  5. Step 5: Solve for x
    x = 36,333,559,528.37/216,886.79
  6. Step 6: Final answer
    x = 167,523.16

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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.