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Finding the Fourth Proportional to 143,497.20, 215,245.80 and 91,009.20

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Solution

The fourth proportional to 143,497.20, 215,245.80 and 91,009.20 is: 136,513.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,497.20 : 215,245.80 = 91,009.20 : x
  2. Step 2: Convert to fraction form
    143,497.20/215,245.80 = 91,009.20/x
  3. Step 3: Cross multiply
    143,497.20x = 215,245.80 × 91,009.20
  4. Step 4: Simplify right side
    143,497.20x = 19,589,348,061.36
  5. Step 5: Solve for x
    x = 19,589,348,061.36/143,497.20
  6. Step 6: Final answer
    x = 136,513.80

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1.5x scale

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.