Home / 143,611.24-198,154.56-86,989.72

Finding the Fourth Proportional to 143,611.24, 198,154.56 and 86,989.72

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Solution

The fourth proportional to 143,611.24, 198,154.56 and 86,989.72 is: 120,028.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,611.24 : 198,154.56 = 86,989.72 : x
  2. Step 2: Convert to fraction form
    143,611.24/198,154.56 = 86,989.72/x
  3. Step 3: Cross multiply
    143,611.24x = 198,154.56 × 86,989.72
  4. Step 4: Simplify right side
    143,611.24x = 17,237,409,691.12
  5. Step 5: Solve for x
    x = 17,237,409,691.12/143,611.24
  6. Step 6: Final answer
    x = 120,028.28

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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.