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Finding the Fourth Proportional to 216,872.51, 299,272.32 and 121,360.75

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Solution

The fourth proportional to 216,872.51, 299,272.32 and 121,360.75 is: 167,471.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,872.51 : 299,272.32 = 121,360.75 : x
  2. Step 2: Convert to fraction form
    216,872.51/299,272.32 = 121,360.75/x
  3. Step 3: Cross multiply
    216,872.51x = 299,272.32 × 121,360.75
  4. Step 4: Simplify right side
    216,872.51x = 36,319,912,461.26
  5. Step 5: Solve for x
    x = 36,319,912,461.26/216,872.51
  6. Step 6: Final answer
    x = 167,471.26

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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.