Home / 72,754.20-100,389.78-40,930.92

Finding the Fourth Proportional to 72,754.20, 100,389.78 and 40,930.92

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Solution

The fourth proportional to 72,754.20, 100,389.78 and 40,930.92 is: 56,478.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,754.20 : 100,389.78 = 40,930.92 : x
  2. Step 2: Convert to fraction form
    72,754.20/100,389.78 = 40,930.92/x
  3. Step 3: Cross multiply
    72,754.20x = 100,389.78 × 40,930.92
  4. Step 4: Simplify right side
    72,754.20x = 4,109,046,054.00
  5. Step 5: Solve for x
    x = 4,109,046,054.00/72,754.20
  6. Step 6: Final answer
    x = 56,478.47

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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.