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Finding the Fourth Proportional to 210,490.00, 315,971.62 and 84,219.32

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Solution

The fourth proportional to 210,490.00, 315,971.62 and 84,219.32 is: 126,423.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,490.00 : 315,971.62 = 84,219.32 : x
  2. Step 2: Convert to fraction form
    210,490.00/315,971.62 = 84,219.32/x
  3. Step 3: Cross multiply
    210,490.00x = 315,971.62 × 84,219.32
  4. Step 4: Simplify right side
    210,490.00x = 26,610,914,554.60
  5. Step 5: Solve for x
    x = 26,610,914,554.60/210,490.00
  6. Step 6: Final answer
    x = 126,423.66

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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.