Home / 143,739.23-198,368.82-79,208.36

Finding the Fourth Proportional to 143,739.23, 198,368.82 and 79,208.36

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Solution

The fourth proportional to 143,739.23, 198,368.82 and 79,208.36 is: 109,312.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,739.23 : 198,368.82 = 79,208.36 : x
  2. Step 2: Convert to fraction form
    143,739.23/198,368.82 = 79,208.36/x
  3. Step 3: Cross multiply
    143,739.23x = 198,368.82 × 79,208.36
  4. Step 4: Simplify right side
    143,739.23x = 15,712,467,915.49
  5. Step 5: Solve for x
    x = 15,712,467,915.49/143,739.23
  6. Step 6: Final answer
    x = 109,312.32

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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.