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Finding the Fourth Proportional to 58,121, 87,194.46 and 21,185

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Solution

The fourth proportional to 58,121, 87,194.46 and 21,185 is: 31,782.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,121 : 87,194.46 = 21,185 : x
  2. Step 2: Convert to fraction form
    58,121/87,194.46 = 21,185/x
  3. Step 3: Cross multiply
    58,121x = 87,194.46 × 21,185
  4. Step 4: Simplify right side
    58,121x = 1,847,214,635.10
  5. Step 5: Solve for x
    x = 1,847,214,635.10/58,121
  6. Step 6: Final answer
    x = 31,782.22

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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.