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Finding the Fourth Proportional to 72,505.64, 100,062.38 and 40,676.60

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Solution

The fourth proportional to 72,505.64, 100,062.38 and 40,676.60 is: 56,136.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,505.64 : 100,062.38 = 40,676.60 : x
  2. Step 2: Convert to fraction form
    72,505.64/100,062.38 = 40,676.60/x
  3. Step 3: Cross multiply
    72,505.64x = 100,062.38 × 40,676.60
  4. Step 4: Simplify right side
    72,505.64x = 4,070,197,406.31
  5. Step 5: Solve for x
    x = 4,070,197,406.31/72,505.64
  6. Step 6: Final answer
    x = 56,136.29

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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.