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Finding the Fourth Proportional to 178,172.40, 266,740.20 and 108,015.60

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Solution

The fourth proportional to 178,172.40, 266,740.20 and 108,015.60 is: 161,709.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,172.40 : 266,740.20 = 108,015.60 : x
  2. Step 2: Convert to fraction form
    178,172.40/266,740.20 = 108,015.60/x
  3. Step 3: Cross multiply
    178,172.40x = 266,740.20 × 108,015.60
  4. Step 4: Simplify right side
    178,172.40x = 28,812,102,747.12
  5. Step 5: Solve for x
    x = 28,812,102,747.12/178,172.40
  6. Step 6: Final answer
    x = 161,709.12

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1.5x scale

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.