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Finding the Fourth Proportional to 85,367.08, 128,028.48 and 25,381.48

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Solution

The fourth proportional to 85,367.08, 128,028.48 and 25,381.48 is: 38,065.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,367.08 : 128,028.48 = 25,381.48 : x
  2. Step 2: Convert to fraction form
    85,367.08/128,028.48 = 25,381.48/x
  3. Step 3: Cross multiply
    85,367.08x = 128,028.48 × 25,381.48
  4. Step 4: Simplify right side
    85,367.08x = 3,249,552,304.55
  5. Step 5: Solve for x
    x = 3,249,552,304.55/85,367.08
  6. Step 6: Final answer
    x = 38,065.64

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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.