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Finding the Fourth Proportional to 143,768.94, 198,402.47 and 79,240.52

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Solution

The fourth proportional to 143,768.94, 198,402.47 and 79,240.52 is: 109,352.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,768.94 : 198,402.47 = 79,240.52 : x
  2. Step 2: Convert to fraction form
    143,768.94/198,402.47 = 79,240.52/x
  3. Step 3: Cross multiply
    143,768.94x = 198,402.47 × 79,240.52
  4. Step 4: Simplify right side
    143,768.94x = 15,721,513,503.87
  5. Step 5: Solve for x
    x = 15,721,513,503.87/143,768.94
  6. Step 6: Final answer
    x = 109,352.64

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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.