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Finding the Fourth Proportional to 130,190.71, 179,654.68 and 72,820.09

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Solution

The fourth proportional to 130,190.71, 179,654.68 and 72,820.09 is: 100,486.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,190.71 : 179,654.68 = 72,820.09 : x
  2. Step 2: Convert to fraction form
    130,190.71/179,654.68 = 72,820.09/x
  3. Step 3: Cross multiply
    130,190.71x = 179,654.68 × 72,820.09
  4. Step 4: Simplify right side
    130,190.71x = 13,082,469,966.52
  5. Step 5: Solve for x
    x = 13,082,469,966.52/130,190.71
  6. Step 6: Final answer
    x = 100,486.97

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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.