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Finding the Fourth Proportional to 72,539.40, 108,820.08 and 25,781.16

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Solution

The fourth proportional to 72,539.40, 108,820.08 and 25,781.16 is: 38,675.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,539.40 : 108,820.08 = 25,781.16 : x
  2. Step 2: Convert to fraction form
    72,539.40/108,820.08 = 25,781.16/x
  3. Step 3: Cross multiply
    72,539.40x = 108,820.08 × 25,781.16
  4. Step 4: Simplify right side
    72,539.40x = 2,805,507,893.69
  5. Step 5: Solve for x
    x = 2,805,507,893.69/72,539.40
  6. Step 6: Final answer
    x = 38,675.64

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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.