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Finding the Fourth Proportional to 230,383.68, 317,890.91 and 128,386.76

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Solution

The fourth proportional to 230,383.68, 317,890.91 and 128,386.76 is: 177,152.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,383.68 : 317,890.91 = 128,386.76 : x
  2. Step 2: Convert to fraction form
    230,383.68/317,890.91 = 128,386.76/x
  3. Step 3: Cross multiply
    230,383.68x = 317,890.91 × 128,386.76
  4. Step 4: Simplify right side
    230,383.68x = 40,812,982,699.86
  5. Step 5: Solve for x
    x = 40,812,982,699.86/230,383.68
  6. Step 6: Final answer
    x = 177,152.23

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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.