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Finding the Fourth Proportional to 129,735.48, 179,040 and 73,145.64

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Solution

The fourth proportional to 129,735.48, 179,040 and 73,145.64 is: 100,943.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,735.48 : 179,040 = 73,145.64 : x
  2. Step 2: Convert to fraction form
    129,735.48/179,040 = 73,145.64/x
  3. Step 3: Cross multiply
    129,735.48x = 179,040 × 73,145.64
  4. Step 4: Simplify right side
    129,735.48x = 13,095,995,385.60
  5. Step 5: Solve for x
    x = 13,095,995,385.60/129,735.48
  6. Step 6: Final answer
    x = 100,943.82

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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.