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Finding the Fourth Proportional to 101,149.76, 139,619.16 and 58,700

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Solution

The fourth proportional to 101,149.76, 139,619.16 and 58,700 is: 81,024.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,149.76 : 139,619.16 = 58,700 : x
  2. Step 2: Convert to fraction form
    101,149.76/139,619.16 = 58,700/x
  3. Step 3: Cross multiply
    101,149.76x = 139,619.16 × 58,700
  4. Step 4: Simplify right side
    101,149.76x = 8,195,644,692
  5. Step 5: Solve for x
    x = 8,195,644,692/101,149.76
  6. Step 6: Final answer
    x = 81,024.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.