Home / 85,635.12-128,420.73-29,459.34

Finding the Fourth Proportional to 85,635.12, 128,420.73 and 29,459.34

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Solution

The fourth proportional to 85,635.12, 128,420.73 and 29,459.34 is: 44,178.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,635.12 : 128,420.73 = 29,459.34 : x
  2. Step 2: Convert to fraction form
    85,635.12/128,420.73 = 29,459.34/x
  3. Step 3: Cross multiply
    85,635.12x = 128,420.73 × 29,459.34
  4. Step 4: Simplify right side
    85,635.12x = 3,783,189,948.12
  5. Step 5: Solve for x
    x = 3,783,189,948.12/85,635.12
  6. Step 6: Final answer
    x = 44,178.02

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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.