Home / 85,520.10-128,301.03-60,268.87

Finding the Fourth Proportional to 85,520.10, 128,301.03 and 60,268.87

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Solution

The fourth proportional to 85,520.10, 128,301.03 and 60,268.87 is: 90,418.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,520.10 : 128,301.03 = 60,268.87 : x
  2. Step 2: Convert to fraction form
    85,520.10/128,301.03 = 60,268.87/x
  3. Step 3: Cross multiply
    85,520.10x = 128,301.03 × 60,268.87
  4. Step 4: Simplify right side
    85,520.10x = 7,732,557,777.18
  5. Step 5: Solve for x
    x = 7,732,557,777.18/85,520.10
  6. Step 6: Final answer
    x = 90,418.02

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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.