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Finding the Fourth Proportional to 100,930.50, 139,277.40 and 60,620.28

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Solution

The fourth proportional to 100,930.50, 139,277.40 and 60,620.28 is: 83,651.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,930.50 : 139,277.40 = 60,620.28 : x
  2. Step 2: Convert to fraction form
    100,930.50/139,277.40 = 60,620.28/x
  3. Step 3: Cross multiply
    100,930.50x = 139,277.40 × 60,620.28
  4. Step 4: Simplify right side
    100,930.50x = 8,443,034,985.67
  5. Step 5: Solve for x
    x = 8,443,034,985.67/100,930.50
  6. Step 6: Final answer
    x = 83,651.97

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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.