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Finding the Fourth Proportional to 230,385.48, 317,918.70 and 128,407.56

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Solution

The fourth proportional to 230,385.48, 317,918.70 and 128,407.56 is: 177,195.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,385.48 : 317,918.70 = 128,407.56 : x
  2. Step 2: Convert to fraction form
    230,385.48/317,918.70 = 128,407.56/x
  3. Step 3: Cross multiply
    230,385.48x = 317,918.70 × 128,407.56
  4. Step 4: Simplify right side
    230,385.48x = 40,823,164,545.37
  5. Step 5: Solve for x
    x = 40,823,164,545.37/230,385.48
  6. Step 6: Final answer
    x = 177,195.04

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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.