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Finding the Fourth Proportional to 72,902.88, 109,315.44 and 37,755.36

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Solution

The fourth proportional to 72,902.88, 109,315.44 and 37,755.36 is: 56,612.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,902.88 : 109,315.44 = 37,755.36 : x
  2. Step 2: Convert to fraction form
    72,902.88/109,315.44 = 37,755.36/x
  3. Step 3: Cross multiply
    72,902.88x = 109,315.44 × 37,755.36
  4. Step 4: Simplify right side
    72,902.88x = 4,127,243,790.76
  5. Step 5: Solve for x
    x = 4,127,243,790.76/72,902.88
  6. Step 6: Final answer
    x = 56,612.90

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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.