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Finding the Fourth Proportional to 72,858.45, 109,258.87 and 35,407.43

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Solution

The fourth proportional to 72,858.45, 109,258.87 and 35,407.43 is: 53,097.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,858.45 : 109,258.87 = 35,407.43 : x
  2. Step 2: Convert to fraction form
    72,858.45/109,258.87 = 35,407.43/x
  3. Step 3: Cross multiply
    72,858.45x = 109,258.87 × 35,407.43
  4. Step 4: Simplify right side
    72,858.45x = 3,868,575,791.40
  5. Step 5: Solve for x
    x = 3,868,575,791.40/72,858.45
  6. Step 6: Final answer
    x = 53,097.15

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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.