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Finding the Fourth Proportional to 121,154, 167,202.76 and 68,172.24

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Solution

The fourth proportional to 121,154, 167,202.76 and 68,172.24 is: 94,083.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,154 : 167,202.76 = 68,172.24 : x
  2. Step 2: Convert to fraction form
    121,154/167,202.76 = 68,172.24/x
  3. Step 3: Cross multiply
    121,154x = 167,202.76 × 68,172.24
  4. Step 4: Simplify right side
    121,154x = 11,398,586,683.38
  5. Step 5: Solve for x
    x = 11,398,586,683.38/121,154
  6. Step 6: Final answer
    x = 94,083.45

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1.5x scale

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.