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Finding the Fourth Proportional to 72,456.60, 108,738.90 and 37,378.20

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Solution

The fourth proportional to 72,456.60, 108,738.90 and 37,378.20 is: 56,095.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,456.60 : 108,738.90 = 37,378.20 : x
  2. Step 2: Convert to fraction form
    72,456.60/108,738.90 = 37,378.20/x
  3. Step 3: Cross multiply
    72,456.60x = 108,738.90 × 37,378.20
  4. Step 4: Simplify right side
    72,456.60x = 4,064,464,351.98
  5. Step 5: Solve for x
    x = 4,064,464,351.98/72,456.60
  6. Step 6: Final answer
    x = 56,095.16

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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.