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Finding the Fourth Proportional to 243,712.80, 336,321.36 and 136,281.60

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Solution

The fourth proportional to 243,712.80, 336,321.36 and 136,281.60 is: 188,067.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,712.80 : 336,321.36 = 136,281.60 : x
  2. Step 2: Convert to fraction form
    243,712.80/336,321.36 = 136,281.60/x
  3. Step 3: Cross multiply
    243,712.80x = 336,321.36 × 136,281.60
  4. Step 4: Simplify right side
    243,712.80x = 45,834,413,054.98
  5. Step 5: Solve for x
    x = 45,834,413,054.98/243,712.80
  6. Step 6: Final answer
    x = 188,067.32

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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.