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Finding the Fourth Proportional to 210,612.52, 315,935.10 and 70,371.64

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Solution

The fourth proportional to 210,612.52, 315,935.10 and 70,371.64 is: 105,562.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,612.52 : 315,935.10 = 70,371.64 : x
  2. Step 2: Convert to fraction form
    210,612.52/315,935.10 = 70,371.64/x
  3. Step 3: Cross multiply
    210,612.52x = 315,935.10 × 70,371.64
  4. Step 4: Simplify right side
    210,612.52x = 22,232,871,120.56
  5. Step 5: Solve for x
    x = 22,232,871,120.56/210,612.52
  6. Step 6: Final answer
    x = 105,562.91

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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.