Home / 85,424.15-128,114.06-25,438.59

Finding the Fourth Proportional to 85,424.15, 128,114.06 and 25,438.59

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Solution

The fourth proportional to 85,424.15, 128,114.06 and 25,438.59 is: 38,151.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,424.15 : 128,114.06 = 25,438.59 : x
  2. Step 2: Convert to fraction form
    85,424.15/128,114.06 = 25,438.59/x
  3. Step 3: Cross multiply
    85,424.15x = 128,114.06 × 25,438.59
  4. Step 4: Simplify right side
    85,424.15x = 3,259,040,918.38
  5. Step 5: Solve for x
    x = 3,259,040,918.38/85,424.15
  6. Step 6: Final answer
    x = 38,151.28

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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.