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Finding the Fourth Proportional to 129,760.36, 179,076.36 and 72,412.36

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Solution

The fourth proportional to 129,760.36, 179,076.36 and 72,412.36 is: 99,933.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,760.36 : 179,076.36 = 72,412.36 : x
  2. Step 2: Convert to fraction form
    129,760.36/179,076.36 = 72,412.36/x
  3. Step 3: Cross multiply
    129,760.36x = 179,076.36 × 72,412.36
  4. Step 4: Simplify right side
    129,760.36x = 12,967,341,847.81
  5. Step 5: Solve for x
    x = 12,967,341,847.81/129,760.36
  6. Step 6: Final answer
    x = 99,933.00

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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.