Home / 143,985.24-198,698.18-79,455

Finding the Fourth Proportional to 143,985.24, 198,698.18 and 79,455

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Solution

The fourth proportional to 143,985.24, 198,698.18 and 79,455 is: 109,647.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,985.24 : 198,698.18 = 79,455 : x
  2. Step 2: Convert to fraction form
    143,985.24/198,698.18 = 79,455/x
  3. Step 3: Cross multiply
    143,985.24x = 198,698.18 × 79,455
  4. Step 4: Simplify right side
    143,985.24x = 15,787,563,891.90
  5. Step 5: Solve for x
    x = 15,787,563,891.90/143,985.24
  6. Step 6: Final answer
    x = 109,647.10

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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.