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Finding the Fourth Proportional to 140,064.60, 209,921.70 and 69,963.48

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Solution

The fourth proportional to 140,064.60, 209,921.70 and 69,963.48 is: 104,857.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,064.60 : 209,921.70 = 69,963.48 : x
  2. Step 2: Convert to fraction form
    140,064.60/209,921.70 = 69,963.48/x
  3. Step 3: Cross multiply
    140,064.60x = 209,921.70 × 69,963.48
  4. Step 4: Simplify right side
    140,064.60x = 14,686,852,659.52
  5. Step 5: Solve for x
    x = 14,686,852,659.52/140,064.60
  6. Step 6: Final answer
    x = 104,857.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.