Home / 72,738.20-100,366.99-40,905.20

Finding the Fourth Proportional to 72,738.20, 100,366.99 and 40,905.20

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Solution

The fourth proportional to 72,738.20, 100,366.99 and 40,905.20 is: 56,442.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,738.20 : 100,366.99 = 40,905.20 : x
  2. Step 2: Convert to fraction form
    72,738.20/100,366.99 = 40,905.20/x
  3. Step 3: Cross multiply
    72,738.20x = 100,366.99 × 40,905.20
  4. Step 4: Simplify right side
    72,738.20x = 4,105,531,948.00
  5. Step 5: Solve for x
    x = 4,105,531,948.00/72,738.20
  6. Step 6: Final answer
    x = 56,442.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.