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Finding the Fourth Proportional to 121,437, 167,604.94 and 71,136

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Solution

The fourth proportional to 121,437, 167,604.94 and 71,136 is: 98,180.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,437 : 167,604.94 = 71,136 : x
  2. Step 2: Convert to fraction form
    121,437/167,604.94 = 71,136/x
  3. Step 3: Cross multiply
    121,437x = 167,604.94 × 71,136
  4. Step 4: Simplify right side
    121,437x = 11,922,745,011.84
  5. Step 5: Solve for x
    x = 11,922,745,011.84/121,437
  6. Step 6: Final answer
    x = 98,180.50

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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.