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Finding the Fourth Proportional to 101,464.52, 139,989.30 and 61,190.60

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Solution

The fourth proportional to 101,464.52, 139,989.30 and 61,190.60 is: 84,423.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,464.52 : 139,989.30 = 61,190.60 : x
  2. Step 2: Convert to fraction form
    101,464.52/139,989.30 = 61,190.60/x
  3. Step 3: Cross multiply
    101,464.52x = 139,989.30 × 61,190.60
  4. Step 4: Simplify right side
    101,464.52x = 8,566,029,260.58
  5. Step 5: Solve for x
    x = 8,566,029,260.58/101,464.52
  6. Step 6: Final answer
    x = 84,423.89

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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.