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Finding the Fourth Proportional to 105,989.40, 158,984.10 and 102,917.40

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Solution

The fourth proportional to 105,989.40, 158,984.10 and 102,917.40 is: 154,376.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,989.40 : 158,984.10 = 102,917.40 : x
  2. Step 2: Convert to fraction form
    105,989.40/158,984.10 = 102,917.40/x
  3. Step 3: Cross multiply
    105,989.40x = 158,984.10 × 102,917.40
  4. Step 4: Simplify right side
    105,989.40x = 16,362,230,213.34
  5. Step 5: Solve for x
    x = 16,362,230,213.34/105,989.40
  6. Step 6: Final answer
    x = 154,376.10

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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.