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Finding the Fourth Proportional to 243,072.65, 335,406.66 and 135,621.80

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Solution

The fourth proportional to 243,072.65, 335,406.66 and 135,621.80 is: 187,139.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,072.65 : 335,406.66 = 135,621.80 : x
  2. Step 2: Convert to fraction form
    243,072.65/335,406.66 = 135,621.80/x
  3. Step 3: Cross multiply
    243,072.65x = 335,406.66 × 135,621.80
  4. Step 4: Simplify right side
    243,072.65x = 45,488,453,284.15
  5. Step 5: Solve for x
    x = 45,488,453,284.15/243,072.65
  6. Step 6: Final answer
    x = 187,139.34

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1.5x scale

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.