Home / 81,109.53-121,622.76-43,180.35

Finding the Fourth Proportional to 81,109.53, 121,622.76 and 43,180.35

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Solution

The fourth proportional to 81,109.53, 121,622.76 and 43,180.35 is: 64,748.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,109.53 : 121,622.76 = 43,180.35 : x
  2. Step 2: Convert to fraction form
    81,109.53/121,622.76 = 43,180.35/x
  3. Step 3: Cross multiply
    81,109.53x = 121,622.76 × 43,180.35
  4. Step 4: Simplify right side
    81,109.53x = 5,251,712,888.68
  5. Step 5: Solve for x
    x = 5,251,712,888.68/81,109.53
  6. Step 6: Final answer
    x = 64,748.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.