Home / 121,609.16-167,772.31-81,259.01

Finding the Fourth Proportional to 121,609.16, 167,772.31 and 81,259.01

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Solution

The fourth proportional to 121,609.16, 167,772.31 and 81,259.01 is: 112,105.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,609.16 : 167,772.31 = 81,259.01 : x
  2. Step 2: Convert to fraction form
    121,609.16/167,772.31 = 81,259.01/x
  3. Step 3: Cross multiply
    121,609.16x = 167,772.31 × 81,259.01
  4. Step 4: Simplify right side
    121,609.16x = 13,633,011,816.01
  5. Step 5: Solve for x
    x = 13,633,011,816.01/121,609.16
  6. Step 6: Final answer
    x = 112,105.14

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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.