Home / 142,776.81-197,021.16-79,113.24

Finding the Fourth Proportional to 142,776.81, 197,021.16 and 79,113.24

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Solution

The fourth proportional to 142,776.81, 197,021.16 and 79,113.24 is: 109,170.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,776.81 : 197,021.16 = 79,113.24 : x
  2. Step 2: Convert to fraction form
    142,776.81/197,021.16 = 79,113.24/x
  3. Step 3: Cross multiply
    142,776.81x = 197,021.16 × 79,113.24
  4. Step 4: Simplify right side
    142,776.81x = 15,586,982,316.16
  5. Step 5: Solve for x
    x = 15,586,982,316.16/142,776.81
  6. Step 6: Final answer
    x = 109,170.27

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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.