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Finding the Fourth Proportional to 198,528.65, 297,661.34 and 72,153.89

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Solution

The fourth proportional to 198,528.65, 297,661.34 and 72,153.89 is: 108,182.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,528.65 : 297,661.34 = 72,153.89 : x
  2. Step 2: Convert to fraction form
    198,528.65/297,661.34 = 72,153.89/x
  3. Step 3: Cross multiply
    198,528.65x = 297,661.34 × 72,153.89
  4. Step 4: Simplify right side
    198,528.65x = 21,477,421,734.54
  5. Step 5: Solve for x
    x = 21,477,421,734.54/198,528.65
  6. Step 6: Final answer
    x = 108,182.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.