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Finding the Fourth Proportional to 85,672.70, 128,509.02 and 23,343.20

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Solution

The fourth proportional to 85,672.70, 128,509.02 and 23,343.20 is: 35,014.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,672.70 : 128,509.02 = 23,343.20 : x
  2. Step 2: Convert to fraction form
    85,672.70/128,509.02 = 23,343.20/x
  3. Step 3: Cross multiply
    85,672.70x = 128,509.02 × 23,343.20
  4. Step 4: Simplify right side
    85,672.70x = 2,999,811,755.66
  5. Step 5: Solve for x
    x = 2,999,811,755.66/85,672.70
  6. Step 6: Final answer
    x = 35,014.79

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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.