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Finding the Fourth Proportional to 121,242.84, 167,384.52 and 81,024.72

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Solution

The fourth proportional to 121,242.84, 167,384.52 and 81,024.72 is: 111,860.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,242.84 : 167,384.52 = 81,024.72 : x
  2. Step 2: Convert to fraction form
    121,242.84/167,384.52 = 81,024.72/x
  3. Step 3: Cross multiply
    121,242.84x = 167,384.52 × 81,024.72
  4. Step 4: Simplify right side
    121,242.84x = 13,562,283,865.33
  5. Step 5: Solve for x
    x = 13,562,283,865.33/121,242.84
  6. Step 6: Final answer
    x = 111,860.49

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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.