Home / 85,556.96-128,309.28-30,140

Finding the Fourth Proportional to 85,556.96, 128,309.28 and 30,140

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Solution

The fourth proportional to 85,556.96, 128,309.28 and 30,140 is: 45,200.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,556.96 : 128,309.28 = 30,140 : x
  2. Step 2: Convert to fraction form
    85,556.96/128,309.28 = 30,140/x
  3. Step 3: Cross multiply
    85,556.96x = 128,309.28 × 30,140
  4. Step 4: Simplify right side
    85,556.96x = 3,867,241,699.20
  5. Step 5: Solve for x
    x = 3,867,241,699.20/85,556.96
  6. Step 6: Final answer
    x = 45,200.78

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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.