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Finding the Fourth Proportional to 115,029.45, 158,873.58 and 76,722.48

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Solution

The fourth proportional to 115,029.45, 158,873.58 and 76,722.48 is: 105,965.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,029.45 : 158,873.58 = 76,722.48 : x
  2. Step 2: Convert to fraction form
    115,029.45/158,873.58 = 76,722.48/x
  3. Step 3: Cross multiply
    115,029.45x = 158,873.58 × 76,722.48
  4. Step 4: Simplify right side
    115,029.45x = 12,189,175,064.08
  5. Step 5: Solve for x
    x = 12,189,175,064.08/115,029.45
  6. Step 6: Final answer
    x = 105,965.69

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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.