Home / 85,474.36-128,206.68-23,140

Finding the Fourth Proportional to 85,474.36, 128,206.68 and 23,140

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Solution

The fourth proportional to 85,474.36, 128,206.68 and 23,140 is: 34,708.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,474.36 : 128,206.68 = 23,140 : x
  2. Step 2: Convert to fraction form
    85,474.36/128,206.68 = 23,140/x
  3. Step 3: Cross multiply
    85,474.36x = 128,206.68 × 23,140
  4. Step 4: Simplify right side
    85,474.36x = 2,966,702,575.20
  5. Step 5: Solve for x
    x = 2,966,702,575.20/85,474.36
  6. Step 6: Final answer
    x = 34,708.68

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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.