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Finding the Fourth Proportional to 226,575, 312,632.66 and 128,458.59

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Solution

The fourth proportional to 226,575, 312,632.66 and 128,458.59 is: 177,249.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    226,575 : 312,632.66 = 128,458.59 : x
  2. Step 2: Convert to fraction form
    226,575/312,632.66 = 128,458.59/x
  3. Step 3: Cross multiply
    226,575x = 312,632.66 × 128,458.59
  4. Step 4: Simplify right side
    226,575x = 40,160,350,049.26
  5. Step 5: Solve for x
    x = 40,160,350,049.26/226,575
  6. Step 6: Final answer
    x = 177,249.70

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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.