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Finding the Fourth Proportional to 70,151.70, 105,158.28 and 28,006.39

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Solution

The fourth proportional to 70,151.70, 105,158.28 and 28,006.39 is: 41,981.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,151.70 : 105,158.28 = 28,006.39 : x
  2. Step 2: Convert to fraction form
    70,151.70/105,158.28 = 28,006.39/x
  3. Step 3: Cross multiply
    70,151.70x = 105,158.28 × 28,006.39
  4. Step 4: Simplify right side
    70,151.70x = 2,945,104,037.88
  5. Step 5: Solve for x
    x = 2,945,104,037.88/70,151.70
  6. Step 6: Final answer
    x = 41,981.93

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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.