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Finding the Fourth Proportional to 158,133.78, 218,224.47 and 86,513.85

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Solution

The fourth proportional to 158,133.78, 218,224.47 and 86,513.85 is: 119,389.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,133.78 : 218,224.47 = 86,513.85 : x
  2. Step 2: Convert to fraction form
    158,133.78/218,224.47 = 86,513.85/x
  3. Step 3: Cross multiply
    158,133.78x = 218,224.47 × 86,513.85
  4. Step 4: Simplify right side
    158,133.78x = 18,879,439,063.91
  5. Step 5: Solve for x
    x = 18,879,439,063.91/158,133.78
  6. Step 6: Final answer
    x = 119,389.03

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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.