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Finding the Fourth Proportional to 138,203.60, 190,625.54 and 84,515.03

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Solution

The fourth proportional to 138,203.60, 190,625.54 and 84,515.03 is: 116,572.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,203.60 : 190,625.54 = 84,515.03 : x
  2. Step 2: Convert to fraction form
    138,203.60/190,625.54 = 84,515.03/x
  3. Step 3: Cross multiply
    138,203.60x = 190,625.54 × 84,515.03
  4. Step 4: Simplify right side
    138,203.60x = 16,110,722,571.01
  5. Step 5: Solve for x
    x = 16,110,722,571.01/138,203.60
  6. Step 6: Final answer
    x = 116,572.38

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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.