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Finding the Fourth Proportional to 210,213.36, 315,123.12 and 69,939.36

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Solution

The fourth proportional to 210,213.36, 315,123.12 and 69,939.36 is: 104,843.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,213.36 : 315,123.12 = 69,939.36 : x
  2. Step 2: Convert to fraction form
    210,213.36/315,123.12 = 69,939.36/x
  3. Step 3: Cross multiply
    210,213.36x = 315,123.12 × 69,939.36
  4. Step 4: Simplify right side
    210,213.36x = 22,039,509,334.00
  5. Step 5: Solve for x
    x = 22,039,509,334.00/210,213.36
  6. Step 6: Final answer
    x = 104,843.52

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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.