Home / 85,571.10-128,407.55-45,619.47

Finding the Fourth Proportional to 85,571.10, 128,407.55 and 45,619.47

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Solution

The fourth proportional to 85,571.10, 128,407.55 and 45,619.47 is: 68,456.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,571.10 : 128,407.55 = 45,619.47 : x
  2. Step 2: Convert to fraction form
    85,571.10/128,407.55 = 45,619.47/x
  3. Step 3: Cross multiply
    85,571.10x = 128,407.55 × 45,619.47
  4. Step 4: Simplify right side
    85,571.10x = 5,857,884,146.90
  5. Step 5: Solve for x
    x = 5,857,884,146.90/85,571.10
  6. Step 6: Final answer
    x = 68,456.34

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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.