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Finding the Fourth Proportional to 101,428.98, 139,937.99 and 58,407.54

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Solution

The fourth proportional to 101,428.98, 139,937.99 and 58,407.54 is: 80,582.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,428.98 : 139,937.99 = 58,407.54 : x
  2. Step 2: Convert to fraction form
    101,428.98/139,937.99 = 58,407.54/x
  3. Step 3: Cross multiply
    101,428.98x = 139,937.99 × 58,407.54
  4. Step 4: Simplify right side
    101,428.98x = 8,173,433,748.44
  5. Step 5: Solve for x
    x = 8,173,433,748.44/101,428.98
  6. Step 6: Final answer
    x = 80,582.83

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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.