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Finding the Fourth Proportional to 130,351.80, 179,966.74 and 100,076.84

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Solution

The fourth proportional to 130,351.80, 179,966.74 and 100,076.84 is: 138,168.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,351.80 : 179,966.74 = 100,076.84 : x
  2. Step 2: Convert to fraction form
    130,351.80/179,966.74 = 100,076.84/x
  3. Step 3: Cross multiply
    130,351.80x = 179,966.74 × 100,076.84
  4. Step 4: Simplify right side
    130,351.80x = 18,010,502,644.30
  5. Step 5: Solve for x
    x = 18,010,502,644.30/130,351.80
  6. Step 6: Final answer
    x = 138,168.42

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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.