Home / 85,399.12-128,176.80-43,308.26

Finding the Fourth Proportional to 85,399.12, 128,176.80 and 43,308.26

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Solution

The fourth proportional to 85,399.12, 128,176.80 and 43,308.26 is: 65,002.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,399.12 : 128,176.80 = 43,308.26 : x
  2. Step 2: Convert to fraction form
    85,399.12/128,176.80 = 43,308.26/x
  3. Step 3: Cross multiply
    85,399.12x = 128,176.80 × 43,308.26
  4. Step 4: Simplify right side
    85,399.12x = 5,551,113,539.48
  5. Step 5: Solve for x
    x = 5,551,113,539.48/85,399.12
  6. Step 6: Final answer
    x = 65,002.00

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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.