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Finding the Fourth Proportional to 100,943.70, 151,245.45 and 79,802.70

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Solution

The fourth proportional to 100,943.70, 151,245.45 and 79,802.70 is: 119,569.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,943.70 : 151,245.45 = 79,802.70 : x
  2. Step 2: Convert to fraction form
    100,943.70/151,245.45 = 79,802.70/x
  3. Step 3: Cross multiply
    100,943.70x = 151,245.45 × 79,802.70
  4. Step 4: Simplify right side
    100,943.70x = 12,069,795,272.72
  5. Step 5: Solve for x
    x = 12,069,795,272.72/100,943.70
  6. Step 6: Final answer
    x = 119,569.57

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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.