Home / 103,640.24-155,285.40-82,820

Finding the Fourth Proportional to 103,640.24, 155,285.40 and 82,820

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Solution

The fourth proportional to 103,640.24, 155,285.40 and 82,820 is: 124,090.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,640.24 : 155,285.40 = 82,820 : x
  2. Step 2: Convert to fraction form
    103,640.24/155,285.40 = 82,820/x
  3. Step 3: Cross multiply
    103,640.24x = 155,285.40 × 82,820
  4. Step 4: Simplify right side
    103,640.24x = 12,860,736,828
  5. Step 5: Solve for x
    x = 12,860,736,828/103,640.24
  6. Step 6: Final answer
    x = 124,090.19

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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.