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Finding the Fourth Proportional to 58,031.20, 86,917.20 and 47,663.20

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Solution

The fourth proportional to 58,031.20, 86,917.20 and 47,663.20 is: 71,388.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,031.20 : 86,917.20 = 47,663.20 : x
  2. Step 2: Convert to fraction form
    58,031.20/86,917.20 = 47,663.20/x
  3. Step 3: Cross multiply
    58,031.20x = 86,917.20 × 47,663.20
  4. Step 4: Simplify right side
    58,031.20x = 4,142,751,887.04
  5. Step 5: Solve for x
    x = 4,142,751,887.04/58,031.20
  6. Step 6: Final answer
    x = 71,388.35

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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.