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Finding the Fourth Proportional to 72,660.80, 109,060.80 and 37,625.60

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Solution

The fourth proportional to 72,660.80, 109,060.80 and 37,625.60 is: 56,474.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,660.80 : 109,060.80 = 37,625.60 : x
  2. Step 2: Convert to fraction form
    72,660.80/109,060.80 = 37,625.60/x
  3. Step 3: Cross multiply
    72,660.80x = 109,060.80 × 37,625.60
  4. Step 4: Simplify right side
    72,660.80x = 4,103,478,036.48
  5. Step 5: Solve for x
    x = 4,103,478,036.48/72,660.80
  6. Step 6: Final answer
    x = 56,474.44

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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.