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Finding the Fourth Proportional to 121,871.02, 167,808.12 and 106,678.66

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Solution

The fourth proportional to 121,871.02, 167,808.12 and 106,678.66 is: 146,889.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,871.02 : 167,808.12 = 106,678.66 : x
  2. Step 2: Convert to fraction form
    121,871.02/167,808.12 = 106,678.66/x
  3. Step 3: Cross multiply
    121,871.02x = 167,808.12 × 106,678.66
  4. Step 4: Simplify right side
    121,871.02x = 17,901,545,378.72
  5. Step 5: Solve for x
    x = 17,901,545,378.72/121,871.02
  6. Step 6: Final answer
    x = 146,889.27

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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.