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Finding the Fourth Proportional to 101,442.98, 139,979.16 and 58,436.48

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Solution

The fourth proportional to 101,442.98, 139,979.16 and 58,436.48 is: 80,635.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,442.98 : 139,979.16 = 58,436.48 : x
  2. Step 2: Convert to fraction form
    101,442.98/139,979.16 = 58,436.48/x
  3. Step 3: Cross multiply
    101,442.98x = 139,979.16 × 58,436.48
  4. Step 4: Simplify right side
    101,442.98x = 8,179,889,383.76
  5. Step 5: Solve for x
    x = 8,179,889,383.76/101,442.98
  6. Step 6: Final answer
    x = 80,635.34

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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.