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Finding the Fourth Proportional to 153,754.86, 212,072.67 and 99,940.62

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Solution

The fourth proportional to 153,754.86, 212,072.67 and 99,940.62 is: 137,847.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,754.86 : 212,072.67 = 99,940.62 : x
  2. Step 2: Convert to fraction form
    153,754.86/212,072.67 = 99,940.62/x
  3. Step 3: Cross multiply
    153,754.86x = 212,072.67 × 99,940.62
  4. Step 4: Simplify right side
    153,754.86x = 21,194,674,124.86
  5. Step 5: Solve for x
    x = 21,194,674,124.86/153,754.86
  6. Step 6: Final answer
    x = 137,847.18

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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.