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Finding the Fourth Proportional to 143,019.84, 197,368.74 and 79,363.56

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Solution

The fourth proportional to 143,019.84, 197,368.74 and 79,363.56 is: 109,522.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,019.84 : 197,368.74 = 79,363.56 : x
  2. Step 2: Convert to fraction form
    143,019.84/197,368.74 = 79,363.56/x
  3. Step 3: Cross multiply
    143,019.84x = 197,368.74 × 79,363.56
  4. Step 4: Simplify right side
    143,019.84x = 15,663,885,839.11
  5. Step 5: Solve for x
    x = 15,663,885,839.11/143,019.84
  6. Step 6: Final answer
    x = 109,522.47

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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.