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Finding the Fourth Proportional to 153,235.99, 230,067.21 and 78,407.78

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Solution

The fourth proportional to 153,235.99, 230,067.21 and 78,407.78 is: 117,720.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,235.99 : 230,067.21 = 78,407.78 : x
  2. Step 2: Convert to fraction form
    153,235.99/230,067.21 = 78,407.78/x
  3. Step 3: Cross multiply
    153,235.99x = 230,067.21 × 78,407.78
  4. Step 4: Simplify right side
    153,235.99x = 18,039,059,186.89
  5. Step 5: Solve for x
    x = 18,039,059,186.89/153,235.99
  6. Step 6: Final answer
    x = 117,720.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.