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Finding the Fourth Proportional to 121,030.71, 167,019.86 and 66,580.59

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Solution

The fourth proportional to 121,030.71, 167,019.86 and 66,580.59 is: 91,879.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,030.71 : 167,019.86 = 66,580.59 : x
  2. Step 2: Convert to fraction form
    121,030.71/167,019.86 = 66,580.59/x
  3. Step 3: Cross multiply
    121,030.71x = 167,019.86 × 66,580.59
  4. Step 4: Simplify right side
    121,030.71x = 11,120,280,673.81
  5. Step 5: Solve for x
    x = 11,120,280,673.81/121,030.71
  6. Step 6: Final answer
    x = 91,879.83

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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.