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Finding the Fourth Proportional to 161,438.80, 242,158.20 and 154,181.20

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Solution

The fourth proportional to 161,438.80, 242,158.20 and 154,181.20 is: 231,271.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,438.80 : 242,158.20 = 154,181.20 : x
  2. Step 2: Convert to fraction form
    161,438.80/242,158.20 = 154,181.20/x
  3. Step 3: Cross multiply
    161,438.80x = 242,158.20 × 154,181.20
  4. Step 4: Simplify right side
    161,438.80x = 37,336,241,865.84
  5. Step 5: Solve for x
    x = 37,336,241,865.84/161,438.80
  6. Step 6: Final answer
    x = 231,271.80

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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.