Home / 142,783.74-197,047.62-79,121.34

Finding the Fourth Proportional to 142,783.74, 197,047.62 and 79,121.34

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Solution

The fourth proportional to 142,783.74, 197,047.62 and 79,121.34 is: 109,190.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,783.74 : 197,047.62 = 79,121.34 : x
  2. Step 2: Convert to fraction form
    142,783.74/197,047.62 = 79,121.34/x
  3. Step 3: Cross multiply
    142,783.74x = 197,047.62 × 79,121.34
  4. Step 4: Simplify right side
    142,783.74x = 15,590,671,738.21
  5. Step 5: Solve for x
    x = 15,590,671,738.21/142,783.74
  6. Step 6: Final answer
    x = 109,190.81

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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.