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Finding the Fourth Proportional to 210,224.48, 315,384.24 and 69,988.64

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Solution

The fourth proportional to 210,224.48, 315,384.24 and 69,988.64 is: 104,998.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,224.48 : 315,384.24 = 69,988.64 : x
  2. Step 2: Convert to fraction form
    210,224.48/315,384.24 = 69,988.64/x
  3. Step 3: Cross multiply
    210,224.48x = 315,384.24 × 69,988.64
  4. Step 4: Simplify right side
    210,224.48x = 22,073,314,035.03
  5. Step 5: Solve for x
    x = 22,073,314,035.03/210,224.48
  6. Step 6: Final answer
    x = 104,998.78

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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.