Home / 143,665.29-198,258.48-80,015.76

Finding the Fourth Proportional to 143,665.29, 198,258.48 and 80,015.76

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Solution

The fourth proportional to 143,665.29, 198,258.48 and 80,015.76 is: 110,421.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,665.29 : 198,258.48 = 80,015.76 : x
  2. Step 2: Convert to fraction form
    143,665.29/198,258.48 = 80,015.76/x
  3. Step 3: Cross multiply
    143,665.29x = 198,258.48 × 80,015.76
  4. Step 4: Simplify right side
    143,665.29x = 15,863,802,953.64
  5. Step 5: Solve for x
    x = 15,863,802,953.64/143,665.29
  6. Step 6: Final answer
    x = 110,421.96

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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.