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Finding the Fourth Proportional to 72,475.16, 100,020.08 and 40,645.88

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Solution

The fourth proportional to 72,475.16, 100,020.08 and 40,645.88 is: 56,093.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,475.16 : 100,020.08 = 40,645.88 : x
  2. Step 2: Convert to fraction form
    72,475.16/100,020.08 = 40,645.88/x
  3. Step 3: Cross multiply
    72,475.16x = 100,020.08 × 40,645.88
  4. Step 4: Simplify right side
    72,475.16x = 4,065,404,169.27
  5. Step 5: Solve for x
    x = 4,065,404,169.27/72,475.16
  6. Step 6: Final answer
    x = 56,093.76

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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.