Home / 323,629.10-485,443.20-86,971.78

Finding the Fourth Proportional to 323,629.10, 485,443.20 and 86,971.78

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Solution

The fourth proportional to 323,629.10, 485,443.20 and 86,971.78 is: 130,457.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,629.10 : 485,443.20 = 86,971.78 : x
  2. Step 2: Convert to fraction form
    323,629.10/485,443.20 = 86,971.78/x
  3. Step 3: Cross multiply
    323,629.10x = 485,443.20 × 86,971.78
  4. Step 4: Simplify right side
    323,629.10x = 42,219,859,192.90
  5. Step 5: Solve for x
    x = 42,219,859,192.90/323,629.10
  6. Step 6: Final answer
    x = 130,457.55

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1.5x scale

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.