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Finding the Fourth Proportional to 72,554.52, 100,120.02 and 40,728.12

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Solution

The fourth proportional to 72,554.52, 100,120.02 and 40,728.12 is: 56,201.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,554.52 : 100,120.02 = 40,728.12 : x
  2. Step 2: Convert to fraction form
    72,554.52/100,120.02 = 40,728.12/x
  3. Step 3: Cross multiply
    72,554.52x = 100,120.02 × 40,728.12
  4. Step 4: Simplify right side
    72,554.52x = 4,077,700,188.96
  5. Step 5: Solve for x
    x = 4,077,700,188.96/72,554.52
  6. Step 6: Final answer
    x = 56,201.88

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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.