Home / 138,109.05-190,587.33-84,393.90

Finding the Fourth Proportional to 138,109.05, 190,587.33 and 84,393.90

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Solution

The fourth proportional to 138,109.05, 190,587.33 and 84,393.90 is: 116,461.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,109.05 : 190,587.33 = 84,393.90 : x
  2. Step 2: Convert to fraction form
    138,109.05/190,587.33 = 84,393.90/x
  3. Step 3: Cross multiply
    138,109.05x = 190,587.33 × 84,393.90
  4. Step 4: Simplify right side
    138,109.05x = 16,084,408,069.29
  5. Step 5: Solve for x
    x = 16,084,408,069.29/138,109.05
  6. Step 6: Final answer
    x = 116,461.65

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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.