Home / 72,648.45-100,254.78-40,382.08

Finding the Fourth Proportional to 72,648.45, 100,254.78 and 40,382.08

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Solution

The fourth proportional to 72,648.45, 100,254.78 and 40,382.08 is: 55,727.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,648.45 : 100,254.78 = 40,382.08 : x
  2. Step 2: Convert to fraction form
    72,648.45/100,254.78 = 40,382.08/x
  3. Step 3: Cross multiply
    72,648.45x = 100,254.78 × 40,382.08
  4. Step 4: Simplify right side
    72,648.45x = 4,048,496,295.71
  5. Step 5: Solve for x
    x = 4,048,496,295.71/72,648.45
  6. Step 6: Final answer
    x = 55,727.22

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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.