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Finding the Fourth Proportional to 103,355.48, 142,621.80 and 58,029.90

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Solution

The fourth proportional to 103,355.48, 142,621.80 and 58,029.90 is: 80,076.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,355.48 : 142,621.80 = 58,029.90 : x
  2. Step 2: Convert to fraction form
    103,355.48/142,621.80 = 58,029.90/x
  3. Step 3: Cross multiply
    103,355.48x = 142,621.80 × 58,029.90
  4. Step 4: Simplify right side
    103,355.48x = 8,276,328,791.82
  5. Step 5: Solve for x
    x = 8,276,328,791.82/103,355.48
  6. Step 6: Final answer
    x = 80,076.35

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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.