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Finding the Fourth Proportional to 103,679.15, 155,579.21 and 43,703.98

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Solution

The fourth proportional to 103,679.15, 155,579.21 and 43,703.98 is: 65,581.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,679.15 : 155,579.21 = 43,703.98 : x
  2. Step 2: Convert to fraction form
    103,679.15/155,579.21 = 43,703.98/x
  3. Step 3: Cross multiply
    103,679.15x = 155,579.21 × 43,703.98
  4. Step 4: Simplify right side
    103,679.15x = 6,799,430,682.26
  5. Step 5: Solve for x
    x = 6,799,430,682.26/103,679.15
  6. Step 6: Final answer
    x = 65,581.47

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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.