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Finding the Fourth Proportional to 103,712.89, 143,126.49 and 58,392.54

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Solution

The fourth proportional to 103,712.89, 143,126.49 and 58,392.54 is: 80,583.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,712.89 : 143,126.49 = 58,392.54 : x
  2. Step 2: Convert to fraction form
    103,712.89/143,126.49 = 58,392.54/x
  3. Step 3: Cross multiply
    103,712.89x = 143,126.49 × 58,392.54
  4. Step 4: Simplify right side
    103,712.89x = 8,357,518,974.63
  5. Step 5: Solve for x
    x = 8,357,518,974.63/103,712.89
  6. Step 6: Final answer
    x = 80,583.23

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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.