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Finding the Fourth Proportional to 58,090.82, 87,128.03 and 18,642.81

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Solution

The fourth proportional to 58,090.82, 87,128.03 and 18,642.81 is: 27,961.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,090.82 : 87,128.03 = 18,642.81 : x
  2. Step 2: Convert to fraction form
    58,090.82/87,128.03 = 18,642.81/x
  3. Step 3: Cross multiply
    58,090.82x = 87,128.03 × 18,642.81
  4. Step 4: Simplify right side
    58,090.82x = 1,624,311,139.77
  5. Step 5: Solve for x
    x = 1,624,311,139.77/58,090.82
  6. Step 6: Final answer
    x = 27,961.58

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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.