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Finding the Fourth Proportional to 85,652.40, 128,486.70 and 23,322.90

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Solution

The fourth proportional to 85,652.40, 128,486.70 and 23,322.90 is: 34,986.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,652.40 : 128,486.70 = 23,322.90 : x
  2. Step 2: Convert to fraction form
    85,652.40/128,486.70 = 23,322.90/x
  3. Step 3: Cross multiply
    85,652.40x = 128,486.70 × 23,322.90
  4. Step 4: Simplify right side
    85,652.40x = 2,996,682,455.43
  5. Step 5: Solve for x
    x = 2,996,682,455.43/85,652.40
  6. Step 6: Final answer
    x = 34,986.56

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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.