Home / 142,939.74-197,258.39-79,281.64

Finding the Fourth Proportional to 142,939.74, 197,258.39 and 79,281.64

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Solution

The fourth proportional to 142,939.74, 197,258.39 and 79,281.64 is: 109,409.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,939.74 : 197,258.39 = 79,281.64 : x
  2. Step 2: Convert to fraction form
    142,939.74/197,258.39 = 79,281.64/x
  3. Step 3: Cross multiply
    142,939.74x = 197,258.39 × 79,281.64
  4. Step 4: Simplify right side
    142,939.74x = 15,638,968,662.96
  5. Step 5: Solve for x
    x = 15,638,968,662.96/142,939.74
  6. Step 6: Final answer
    x = 109,409.52

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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.