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Finding the Fourth Proportional to 121,502.08, 167,741.76 and 79,039.36

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Solution

The fourth proportional to 121,502.08, 167,741.76 and 79,039.36 is: 109,119.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,502.08 : 167,741.76 = 79,039.36 : x
  2. Step 2: Convert to fraction form
    121,502.08/167,741.76 = 79,039.36/x
  3. Step 3: Cross multiply
    121,502.08x = 167,741.76 × 79,039.36
  4. Step 4: Simplify right side
    121,502.08x = 13,258,201,355.67
  5. Step 5: Solve for x
    x = 13,258,201,355.67/121,502.08
  6. Step 6: Final answer
    x = 109,119.13

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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.