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Finding the Fourth Proportional to 143,569.98, 198,124.59 and 79,907.80

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Solution

The fourth proportional to 143,569.98, 198,124.59 and 79,907.80 is: 110,271.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,569.98 : 198,124.59 = 79,907.80 : x
  2. Step 2: Convert to fraction form
    143,569.98/198,124.59 = 79,907.80/x
  3. Step 3: Cross multiply
    143,569.98x = 198,124.59 × 79,907.80
  4. Step 4: Simplify right side
    143,569.98x = 15,831,700,112.80
  5. Step 5: Solve for x
    x = 15,831,700,112.80/143,569.98
  6. Step 6: Final answer
    x = 110,271.66

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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.