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Finding the Fourth Proportional to 137,987.94, 190,440.94 and 84,261.64

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Solution

The fourth proportional to 137,987.94, 190,440.94 and 84,261.64 is: 116,291.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,987.94 : 190,440.94 = 84,261.64 : x
  2. Step 2: Convert to fraction form
    137,987.94/190,440.94 = 84,261.64/x
  3. Step 3: Cross multiply
    137,987.94x = 190,440.94 × 84,261.64
  4. Step 4: Simplify right side
    137,987.94x = 16,046,865,927.54
  5. Step 5: Solve for x
    x = 16,046,865,927.54/137,987.94
  6. Step 6: Final answer
    x = 116,291.80

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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.