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Finding the Fourth Proportional to 121,434, 167,600.79 and 71,133

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Solution

The fourth proportional to 121,434, 167,600.79 and 71,133 is: 98,176.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,434 : 167,600.79 = 71,133 : x
  2. Step 2: Convert to fraction form
    121,434/167,600.79 = 71,133/x
  3. Step 3: Cross multiply
    121,434x = 167,600.79 × 71,133
  4. Step 4: Simplify right side
    121,434x = 11,921,946,995.07
  5. Step 5: Solve for x
    x = 11,921,946,995.07/121,434
  6. Step 6: Final answer
    x = 98,176.35

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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.