Home / 85,543.31-128,315.03-23,213.81

Finding the Fourth Proportional to 85,543.31, 128,315.03 and 23,213.81

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Solution

The fourth proportional to 85,543.31, 128,315.03 and 23,213.81 is: 34,820.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,543.31 : 128,315.03 = 23,213.81 : x
  2. Step 2: Convert to fraction form
    85,543.31/128,315.03 = 23,213.81/x
  3. Step 3: Cross multiply
    85,543.31x = 128,315.03 × 23,213.81
  4. Step 4: Simplify right side
    85,543.31x = 2,978,679,968.92
  5. Step 5: Solve for x
    x = 2,978,679,968.92/85,543.31
  6. Step 6: Final answer
    x = 34,820.73

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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.