Home / 87,255.32-120,409.00-53,320.57

Finding the Fourth Proportional to 87,255.32, 120,409.00 and 53,320.57

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Solution

The fourth proportional to 87,255.32, 120,409.00 and 53,320.57 is: 73,580.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,255.32 : 120,409.00 = 53,320.57 : x
  2. Step 2: Convert to fraction form
    87,255.32/120,409.00 = 53,320.57/x
  3. Step 3: Cross multiply
    87,255.32x = 120,409.00 × 53,320.57
  4. Step 4: Simplify right side
    87,255.32x = 6,420,276,078.81
  5. Step 5: Solve for x
    x = 6,420,276,078.81/87,255.32
  6. Step 6: Final answer
    x = 73,580.34

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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.