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Finding the Fourth Proportional to 130,215.42, 179,686.42 and 120,694.68

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Solution

The fourth proportional to 130,215.42, 179,686.42 and 120,694.68 is: 166,548.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,215.42 : 179,686.42 = 120,694.68 : x
  2. Step 2: Convert to fraction form
    130,215.42/179,686.42 = 120,694.68/x
  3. Step 3: Cross multiply
    130,215.42x = 179,686.42 × 120,694.68
  4. Step 4: Simplify right side
    130,215.42x = 21,687,194,660.51
  5. Step 5: Solve for x
    x = 21,687,194,660.51/130,215.42
  6. Step 6: Final answer
    x = 166,548.59

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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.