Home / 81,105.42-121,627.08-38,973.54

Finding the Fourth Proportional to 81,105.42, 121,627.08 and 38,973.54

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Solution

The fourth proportional to 81,105.42, 121,627.08 and 38,973.54 is: 58,445.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,105.42 : 121,627.08 = 38,973.54 : x
  2. Step 2: Convert to fraction form
    81,105.42/121,627.08 = 38,973.54/x
  3. Step 3: Cross multiply
    81,105.42x = 121,627.08 × 38,973.54
  4. Step 4: Simplify right side
    81,105.42x = 4,740,237,867.46
  5. Step 5: Solve for x
    x = 4,740,237,867.46/81,105.42
  6. Step 6: Final answer
    x = 58,445.39

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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.