Home / 121,717.02-167,768.74-81,416.28

Finding the Fourth Proportional to 121,717.02, 167,768.74 and 81,416.28

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Solution

The fourth proportional to 121,717.02, 167,768.74 and 81,416.28 is: 112,220.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,717.02 : 167,768.74 = 81,416.28 : x
  2. Step 2: Convert to fraction form
    121,717.02/167,768.74 = 81,416.28/x
  3. Step 3: Cross multiply
    121,717.02x = 167,768.74 × 81,416.28
  4. Step 4: Simplify right side
    121,717.02x = 13,659,106,711.09
  5. Step 5: Solve for x
    x = 13,659,106,711.09/121,717.02
  6. Step 6: Final answer
    x = 112,220.19

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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.