Home / 85,460.08-128,119.92-55,505.20

Finding the Fourth Proportional to 85,460.08, 128,119.92 and 55,505.20

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Solution

The fourth proportional to 85,460.08, 128,119.92 and 55,505.20 is: 83,212.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,460.08 : 128,119.92 = 55,505.20 : x
  2. Step 2: Convert to fraction form
    85,460.08/128,119.92 = 55,505.20/x
  3. Step 3: Cross multiply
    85,460.08x = 128,119.92 × 55,505.20
  4. Step 4: Simplify right side
    85,460.08x = 7,111,321,783.58
  5. Step 5: Solve for x
    x = 7,111,321,783.58/85,460.08
  6. Step 6: Final answer
    x = 83,212.21

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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.