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Finding the Fourth Proportional to 58,461.90, 87,671.16 and 21,011.88

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Solution

The fourth proportional to 58,461.90, 87,671.16 and 21,011.88 is: 31,510.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,461.90 : 87,671.16 = 21,011.88 : x
  2. Step 2: Convert to fraction form
    58,461.90/87,671.16 = 21,011.88/x
  3. Step 3: Cross multiply
    58,461.90x = 87,671.16 × 21,011.88
  4. Step 4: Simplify right side
    58,461.90x = 1,842,135,893.38
  5. Step 5: Solve for x
    x = 1,842,135,893.38/58,461.90
  6. Step 6: Final answer
    x = 31,510.02

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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.