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Finding the Fourth Proportional to 172,342.60, 258,003.60 and 128,165.20

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Solution

The fourth proportional to 172,342.60, 258,003.60 and 128,165.20 is: 191,868.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,342.60 : 258,003.60 = 128,165.20 : x
  2. Step 2: Convert to fraction form
    172,342.60/258,003.60 = 128,165.20/x
  3. Step 3: Cross multiply
    172,342.60x = 258,003.60 × 128,165.20
  4. Step 4: Simplify right side
    172,342.60x = 33,067,082,994.72
  5. Step 5: Solve for x
    x = 33,067,082,994.72/172,342.60
  6. Step 6: Final answer
    x = 191,868.31

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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.