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Finding the Fourth Proportional to 58,583.21, 87,856.65 and 21,138.44

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Solution

The fourth proportional to 58,583.21, 87,856.65 and 21,138.44 is: 31,701.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,583.21 : 87,856.65 = 21,138.44 : x
  2. Step 2: Convert to fraction form
    58,583.21/87,856.65 = 21,138.44/x
  3. Step 3: Cross multiply
    58,583.21x = 87,856.65 × 21,138.44
  4. Step 4: Simplify right side
    58,583.21x = 1,857,152,085.34
  5. Step 5: Solve for x
    x = 1,857,152,085.34/58,583.21
  6. Step 6: Final answer
    x = 31,701.10

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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.