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Finding the Fourth Proportional to 230,181.77, 317,660.65 and 128,207.21

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Solution

The fourth proportional to 230,181.77, 317,660.65 and 128,207.21 is: 176,931.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,181.77 : 317,660.65 = 128,207.21 : x
  2. Step 2: Convert to fraction form
    230,181.77/317,660.65 = 128,207.21/x
  3. Step 3: Cross multiply
    230,181.77x = 317,660.65 × 128,207.21
  4. Step 4: Simplify right side
    230,181.77x = 40,726,383,754.47
  5. Step 5: Solve for x
    x = 40,726,383,754.47/230,181.77
  6. Step 6: Final answer
    x = 176,931.40

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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.