Home / 256,001.18-353,290.11-139,721

Finding the Fourth Proportional to 256,001.18, 353,290.11 and 139,721

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Solution

The fourth proportional to 256,001.18, 353,290.11 and 139,721 is: 192,819.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,001.18 : 353,290.11 = 139,721 : x
  2. Step 2: Convert to fraction form
    256,001.18/353,290.11 = 139,721/x
  3. Step 3: Cross multiply
    256,001.18x = 353,290.11 × 139,721
  4. Step 4: Simplify right side
    256,001.18x = 49,362,047,459.31
  5. Step 5: Solve for x
    x = 49,362,047,459.31/256,001.18
  6. Step 6: Final answer
    x = 192,819.61

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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.