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Finding the Fourth Proportional to 243,048.78, 335,423.97 and 135,639.54

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Solution

The fourth proportional to 243,048.78, 335,423.97 and 135,639.54 is: 187,191.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,048.78 : 335,423.97 = 135,639.54 : x
  2. Step 2: Convert to fraction form
    243,048.78/335,423.97 = 135,639.54/x
  3. Step 3: Cross multiply
    243,048.78x = 335,423.97 × 135,639.54
  4. Step 4: Simplify right side
    243,048.78x = 45,496,752,995.77
  5. Step 5: Solve for x
    x = 45,496,752,995.77/243,048.78
  6. Step 6: Final answer
    x = 187,191.86

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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.