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Finding the Fourth Proportional to 72,725.92, 100,370.64 and 40,896.16

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Solution

The fourth proportional to 72,725.92, 100,370.64 and 40,896.16 is: 56,441.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,725.92 : 100,370.64 = 40,896.16 : x
  2. Step 2: Convert to fraction form
    72,725.92/100,370.64 = 40,896.16/x
  3. Step 3: Cross multiply
    72,725.92x = 100,370.64 × 40,896.16
  4. Step 4: Simplify right side
    72,725.92x = 4,104,773,752.74
  5. Step 5: Solve for x
    x = 4,104,773,752.74/72,725.92
  6. Step 6: Final answer
    x = 56,441.69

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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.