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Finding the Fourth Proportional to 81,275.33, 121,913.15 and 43,853.01

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Solution

The fourth proportional to 81,275.33, 121,913.15 and 43,853.01 is: 65,779.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,275.33 : 121,913.15 = 43,853.01 : x
  2. Step 2: Convert to fraction form
    81,275.33/121,913.15 = 43,853.01/x
  3. Step 3: Cross multiply
    81,275.33x = 121,913.15 × 43,853.01
  4. Step 4: Simplify right side
    81,275.33x = 5,346,258,366.82
  5. Step 5: Solve for x
    x = 5,346,258,366.82/81,275.33
  6. Step 6: Final answer
    x = 65,779.60

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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.