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Finding the Fourth Proportional to 130,179.57, 179,661.33 and 74,990.79

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Solution

The fourth proportional to 130,179.57, 179,661.33 and 74,990.79 is: 103,495.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,179.57 : 179,661.33 = 74,990.79 : x
  2. Step 2: Convert to fraction form
    130,179.57/179,661.33 = 74,990.79/x
  3. Step 3: Cross multiply
    130,179.57x = 179,661.33 × 74,990.79
  4. Step 4: Simplify right side
    130,179.57x = 13,472,945,321.80
  5. Step 5: Solve for x
    x = 13,472,945,321.80/130,179.57
  6. Step 6: Final answer
    x = 103,495.09

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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.