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Finding the Fourth Proportional to 121,574.81, 167,792.69 and 71,273.81

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Solution

The fourth proportional to 121,574.81, 167,792.69 and 71,273.81 is: 98,369.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,574.81 : 167,792.69 = 71,273.81 : x
  2. Step 2: Convert to fraction form
    121,574.81/167,792.69 = 71,273.81/x
  3. Step 3: Cross multiply
    121,574.81x = 167,792.69 × 71,273.81
  4. Step 4: Simplify right side
    121,574.81x = 11,959,224,904.12
  5. Step 5: Solve for x
    x = 11,959,224,904.12/121,574.81
  6. Step 6: Final answer
    x = 98,369.26

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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.