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Finding the Fourth Proportional to 58,663.31, 87,973.50 and 21,214.40

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Solution

The fourth proportional to 58,663.31, 87,973.50 and 21,214.40 is: 31,813.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,663.31 : 87,973.50 = 21,214.40 : x
  2. Step 2: Convert to fraction form
    58,663.31/87,973.50 = 21,214.40/x
  3. Step 3: Cross multiply
    58,663.31x = 87,973.50 × 21,214.40
  4. Step 4: Simplify right side
    58,663.31x = 1,866,305,018.40
  5. Step 5: Solve for x
    x = 1,866,305,018.40/58,663.31
  6. Step 6: Final answer
    x = 31,813.84

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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.