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Finding the Fourth Proportional to 210,633.52, 315,966.64 and 70,392.64

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Solution

The fourth proportional to 210,633.52, 315,966.64 and 70,392.64 is: 105,594.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,633.52 : 315,966.64 = 70,392.64 : x
  2. Step 2: Convert to fraction form
    210,633.52/315,966.64 = 70,392.64/x
  3. Step 3: Cross multiply
    210,633.52x = 315,966.64 × 70,392.64
  4. Step 4: Simplify right side
    210,633.52x = 22,241,725,941.53
  5. Step 5: Solve for x
    x = 22,241,725,941.53/210,633.52
  6. Step 6: Final answer
    x = 105,594.43

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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.