Home / 205,101.78-307,613.70-86,856.12

Finding the Fourth Proportional to 205,101.78, 307,613.70 and 86,856.12

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Solution

The fourth proportional to 205,101.78, 307,613.70 and 86,856.12 is: 130,267.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,101.78 : 307,613.70 = 86,856.12 : x
  2. Step 2: Convert to fraction form
    205,101.78/307,613.70 = 86,856.12/x
  3. Step 3: Cross multiply
    205,101.78x = 307,613.70 × 86,856.12
  4. Step 4: Simplify right side
    205,101.78x = 26,718,132,440.84
  5. Step 5: Solve for x
    x = 26,718,132,440.84/205,101.78
  6. Step 6: Final answer
    x = 130,267.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.