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Finding the Fourth Proportional to 140,018.64, 193,218.12 and 80,402.64

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Solution

The fourth proportional to 140,018.64, 193,218.12 and 80,402.64 is: 110,951.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,018.64 : 193,218.12 = 80,402.64 : x
  2. Step 2: Convert to fraction form
    140,018.64/193,218.12 = 80,402.64/x
  3. Step 3: Cross multiply
    140,018.64x = 193,218.12 × 80,402.64
  4. Step 4: Simplify right side
    140,018.64x = 15,535,246,943.84
  5. Step 5: Solve for x
    x = 15,535,246,943.84/140,018.64
  6. Step 6: Final answer
    x = 110,951.28

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1.5x scale

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.