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Finding the Fourth Proportional to 121,053.86, 167,055.60 and 66,606.74

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Solution

The fourth proportional to 121,053.86, 167,055.60 and 66,606.74 is: 91,918.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,053.86 : 167,055.60 = 66,606.74 : x
  2. Step 2: Convert to fraction form
    121,053.86/167,055.60 = 66,606.74/x
  3. Step 3: Cross multiply
    121,053.86x = 167,055.60 × 66,606.74
  4. Step 4: Simplify right side
    121,053.86x = 11,127,028,581.04
  5. Step 5: Solve for x
    x = 11,127,028,581.04/121,053.86
  6. Step 6: Final answer
    x = 91,918.00

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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.