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Finding the Fourth Proportional to 58,453.71, 87,689.97 and 20,513.52

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Solution

The fourth proportional to 58,453.71, 87,689.97 and 20,513.52 is: 30,773.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,453.71 : 87,689.97 = 20,513.52 : x
  2. Step 2: Convert to fraction form
    58,453.71/87,689.97 = 20,513.52/x
  3. Step 3: Cross multiply
    58,453.71x = 87,689.97 × 20,513.52
  4. Step 4: Simplify right side
    58,453.71x = 1,798,829,953.39
  5. Step 5: Solve for x
    x = 1,798,829,953.39/58,453.71
  6. Step 6: Final answer
    x = 30,773.58

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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.