Home / 85,603.12-128,355.30-26,422.96

Finding the Fourth Proportional to 85,603.12, 128,355.30 and 26,422.96

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Solution

The fourth proportional to 85,603.12, 128,355.30 and 26,422.96 is: 39,619.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,603.12 : 128,355.30 = 26,422.96 : x
  2. Step 2: Convert to fraction form
    85,603.12/128,355.30 = 26,422.96/x
  3. Step 3: Cross multiply
    85,603.12x = 128,355.30 × 26,422.96
  4. Step 4: Simplify right side
    85,603.12x = 3,391,526,957.69
  5. Step 5: Solve for x
    x = 3,391,526,957.69/85,603.12
  6. Step 6: Final answer
    x = 39,619.20

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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.