Home / 142,921.76-197,223-79,259.60

Finding the Fourth Proportional to 142,921.76, 197,223 and 79,259.60

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Solution

The fourth proportional to 142,921.76, 197,223 and 79,259.60 is: 109,373.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,921.76 : 197,223 = 79,259.60 : x
  2. Step 2: Convert to fraction form
    142,921.76/197,223 = 79,259.60/x
  3. Step 3: Cross multiply
    142,921.76x = 197,223 × 79,259.60
  4. Step 4: Simplify right side
    142,921.76x = 15,631,816,090.80
  5. Step 5: Solve for x
    x = 15,631,816,090.80/142,921.76
  6. Step 6: Final answer
    x = 109,373.24

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1.5x scale

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.