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Finding the Fourth Proportional to 58,687.40, 88,031.10 and 21,265.40

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Solution

The fourth proportional to 58,687.40, 88,031.10 and 21,265.40 is: 31,898.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,687.40 : 88,031.10 = 21,265.40 : x
  2. Step 2: Convert to fraction form
    58,687.40/88,031.10 = 21,265.40/x
  3. Step 3: Cross multiply
    58,687.40x = 88,031.10 × 21,265.40
  4. Step 4: Simplify right side
    58,687.40x = 1,872,016,553.94
  5. Step 5: Solve for x
    x = 1,872,016,553.94/58,687.40
  6. Step 6: Final answer
    x = 31,898.10

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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.