Home / 121,106.74-167,128.81-66,665.20

Finding the Fourth Proportional to 121,106.74, 167,128.81 and 66,665.20

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Solution

The fourth proportional to 121,106.74, 167,128.81 and 66,665.20 is: 91,998.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,106.74 : 167,128.81 = 66,665.20 : x
  2. Step 2: Convert to fraction form
    121,106.74/167,128.81 = 66,665.20/x
  3. Step 3: Cross multiply
    121,106.74x = 167,128.81 × 66,665.20
  4. Step 4: Simplify right side
    121,106.74x = 11,141,675,544.41
  5. Step 5: Solve for x
    x = 11,141,675,544.41/121,106.74
  6. Step 6: Final answer
    x = 91,998.81

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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.