Home / 138,354.60-190,929.72-80,983.50

Finding the Fourth Proportional to 138,354.60, 190,929.72 and 80,983.50

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Solution

The fourth proportional to 138,354.60, 190,929.72 and 80,983.50 is: 111,757.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,354.60 : 190,929.72 = 80,983.50 : x
  2. Step 2: Convert to fraction form
    138,354.60/190,929.72 = 80,983.50/x
  3. Step 3: Cross multiply
    138,354.60x = 190,929.72 × 80,983.50
  4. Step 4: Simplify right side
    138,354.60x = 15,462,156,979.62
  5. Step 5: Solve for x
    x = 15,462,156,979.62/138,354.60
  6. Step 6: Final answer
    x = 111,757.45

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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.