Home / 57,078.30-78,762.68-38,643.91

Finding the Fourth Proportional to 57,078.30, 78,762.68 and 38,643.91

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Solution

The fourth proportional to 57,078.30, 78,762.68 and 38,643.91 is: 53,324.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,078.30 : 78,762.68 = 38,643.91 : x
  2. Step 2: Convert to fraction form
    57,078.30/78,762.68 = 38,643.91/x
  3. Step 3: Cross multiply
    57,078.30x = 78,762.68 × 38,643.91
  4. Step 4: Simplify right side
    57,078.30x = 3,043,697,917.28
  5. Step 5: Solve for x
    x = 3,043,697,917.28/57,078.30
  6. Step 6: Final answer
    x = 53,324.96

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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.