Home / 103,515.02-155,272.53-82,640.78

Finding the Fourth Proportional to 103,515.02, 155,272.53 and 82,640.78

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Solution

The fourth proportional to 103,515.02, 155,272.53 and 82,640.78 is: 123,961.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,515.02 : 155,272.53 = 82,640.78 : x
  2. Step 2: Convert to fraction form
    103,515.02/155,272.53 = 82,640.78/x
  3. Step 3: Cross multiply
    103,515.02x = 155,272.53 × 82,640.78
  4. Step 4: Simplify right side
    103,515.02x = 12,831,842,991.77
  5. Step 5: Solve for x
    x = 12,831,842,991.77/103,515.02
  6. Step 6: Final answer
    x = 123,961.17

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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.