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Finding the Fourth Proportional to 72,507.88, 100,059.30 and 40,676.20

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Solution

The fourth proportional to 72,507.88, 100,059.30 and 40,676.20 is: 56,132.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,507.88 : 100,059.30 = 40,676.20 : x
  2. Step 2: Convert to fraction form
    72,507.88/100,059.30 = 40,676.20/x
  3. Step 3: Cross multiply
    72,507.88x = 100,059.30 × 40,676.20
  4. Step 4: Simplify right side
    72,507.88x = 4,070,032,098.66
  5. Step 5: Solve for x
    x = 4,070,032,098.66/72,507.88
  6. Step 6: Final answer
    x = 56,132.27

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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.