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Finding the Fourth Proportional to 103,263.48, 142,550.82 and 79,381.80

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Solution

The fourth proportional to 103,263.48, 142,550.82 and 79,381.80 is: 109,583.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,263.48 : 142,550.82 = 79,381.80 : x
  2. Step 2: Convert to fraction form
    103,263.48/142,550.82 = 79,381.80/x
  3. Step 3: Cross multiply
    103,263.48x = 142,550.82 × 79,381.80
  4. Step 4: Simplify right side
    103,263.48x = 11,315,940,683.08
  5. Step 5: Solve for x
    x = 11,315,940,683.08/103,263.48
  6. Step 6: Final answer
    x = 109,583.18

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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.