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Finding the Fourth Proportional to 425,755.96, 638,649.02 and 105,909.48

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Solution

The fourth proportional to 425,755.96, 638,649.02 and 105,909.48 is: 158,867.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,755.96 : 638,649.02 = 105,909.48 : x
  2. Step 2: Convert to fraction form
    425,755.96/638,649.02 = 105,909.48/x
  3. Step 3: Cross multiply
    425,755.96x = 638,649.02 × 105,909.48
  4. Step 4: Simplify right side
    425,755.96x = 67,638,985,610.71
  5. Step 5: Solve for x
    x = 67,638,985,610.71/425,755.96
  6. Step 6: Final answer
    x = 158,867.97

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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.