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Finding the Fourth Proportional to 143,925.65, 198,608.00 and 79,391.01

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Solution

The fourth proportional to 143,925.65, 198,608.00 and 79,391.01 is: 109,554.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,925.65 : 198,608.00 = 79,391.01 : x
  2. Step 2: Convert to fraction form
    143,925.65/198,608.00 = 79,391.01/x
  3. Step 3: Cross multiply
    143,925.65x = 198,608.00 × 79,391.01
  4. Step 4: Simplify right side
    143,925.65x = 15,767,689,317.13
  5. Step 5: Solve for x
    x = 15,767,689,317.13/143,925.65
  6. Step 6: Final answer
    x = 109,554.41

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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.