Home / 103,995.21-156,026.21-72,108.75

Finding the Fourth Proportional to 103,995.21, 156,026.21 and 72,108.75

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Solution

The fourth proportional to 103,995.21, 156,026.21 and 72,108.75 is: 108,186.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,995.21 : 156,026.21 = 72,108.75 : x
  2. Step 2: Convert to fraction form
    103,995.21/156,026.21 = 72,108.75/x
  3. Step 3: Cross multiply
    103,995.21x = 156,026.21 × 72,108.75
  4. Step 4: Simplify right side
    103,995.21x = 11,250,854,609.79
  5. Step 5: Solve for x
    x = 11,250,854,609.79/103,995.21
  6. Step 6: Final answer
    x = 108,186.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.