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Finding the Fourth Proportional to 436,661.12, 654,991.67 and 121,118.01

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Solution

The fourth proportional to 436,661.12, 654,991.67 and 121,118.01 is: 181,677.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,661.12 : 654,991.67 = 121,118.01 : x
  2. Step 2: Convert to fraction form
    436,661.12/654,991.67 = 121,118.01/x
  3. Step 3: Cross multiply
    436,661.12x = 654,991.67 × 121,118.01
  4. Step 4: Simplify right side
    436,661.12x = 79,331,287,031.39
  5. Step 5: Solve for x
    x = 79,331,287,031.39/436,661.12
  6. Step 6: Final answer
    x = 181,677.01

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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.