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Finding the Fourth Proportional to 58,102.67, 87,119.17 and 20,139.39

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Solution

The fourth proportional to 58,102.67, 87,119.17 and 20,139.39 is: 30,197.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,102.67 : 87,119.17 = 20,139.39 : x
  2. Step 2: Convert to fraction form
    58,102.67/87,119.17 = 20,139.39/x
  3. Step 3: Cross multiply
    58,102.67x = 87,119.17 × 20,139.39
  4. Step 4: Simplify right side
    58,102.67x = 1,754,526,890.76
  5. Step 5: Solve for x
    x = 1,754,526,890.76/58,102.67
  6. Step 6: Final answer
    x = 30,197.01

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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.