Home / 121,140.26-167,102.70-78,727.04

Finding the Fourth Proportional to 121,140.26, 167,102.70 and 78,727.04

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Solution

The fourth proportional to 121,140.26, 167,102.70 and 78,727.04 is: 108,597.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,140.26 : 167,102.70 = 78,727.04 : x
  2. Step 2: Convert to fraction form
    121,140.26/167,102.70 = 78,727.04/x
  3. Step 3: Cross multiply
    121,140.26x = 167,102.70 × 78,727.04
  4. Step 4: Simplify right side
    121,140.26x = 13,155,500,947.01
  5. Step 5: Solve for x
    x = 13,155,500,947.01/121,140.26
  6. Step 6: Final answer
    x = 108,597.27

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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.