Home / 129,739.20-179,032.80-73,147.20

Finding the Fourth Proportional to 129,739.20, 179,032.80 and 73,147.20

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Solution

The fourth proportional to 129,739.20, 179,032.80 and 73,147.20 is: 100,939.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,739.20 : 179,032.80 = 73,147.20 : x
  2. Step 2: Convert to fraction form
    129,739.20/179,032.80 = 73,147.20/x
  3. Step 3: Cross multiply
    129,739.20x = 179,032.80 × 73,147.20
  4. Step 4: Simplify right side
    129,739.20x = 13,095,748,028.16
  5. Step 5: Solve for x
    x = 13,095,748,028.16/129,739.20
  6. Step 6: Final answer
    x = 100,939.02

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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.