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Finding the Fourth Proportional to 140,260.60, 193,359.52 and 86,509.61

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Solution

The fourth proportional to 140,260.60, 193,359.52 and 86,509.61 is: 119,259.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,260.60 : 193,359.52 = 86,509.61 : x
  2. Step 2: Convert to fraction form
    140,260.60/193,359.52 = 86,509.61/x
  3. Step 3: Cross multiply
    140,260.60x = 193,359.52 × 86,509.61
  4. Step 4: Simplify right side
    140,260.60x = 16,727,456,664.99
  5. Step 5: Solve for x
    x = 16,727,456,664.99/140,260.60
  6. Step 6: Final answer
    x = 119,259.84

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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.