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Finding the Fourth Proportional to 138,358.49, 190,949.06 and 84,679.25

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Solution

The fourth proportional to 138,358.49, 190,949.06 and 84,679.25 is: 116,866.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,358.49 : 190,949.06 = 84,679.25 : x
  2. Step 2: Convert to fraction form
    138,358.49/190,949.06 = 84,679.25/x
  3. Step 3: Cross multiply
    138,358.49x = 190,949.06 × 84,679.25
  4. Step 4: Simplify right side
    138,358.49x = 16,169,422,445.96
  5. Step 5: Solve for x
    x = 16,169,422,445.96/138,358.49
  6. Step 6: Final answer
    x = 116,866.14

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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.