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Finding the Fourth Proportional to 72,675.20, 109,045.20 and 25,961.60

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Solution

The fourth proportional to 72,675.20, 109,045.20 and 25,961.60 is: 38,953.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,675.20 : 109,045.20 = 25,961.60 : x
  2. Step 2: Convert to fraction form
    72,675.20/109,045.20 = 25,961.60/x
  3. Step 3: Cross multiply
    72,675.20x = 109,045.20 × 25,961.60
  4. Step 4: Simplify right side
    72,675.20x = 2,830,987,864.32
  5. Step 5: Solve for x
    x = 2,830,987,864.32/72,675.20
  6. Step 6: Final answer
    x = 38,953.97

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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.