Home / 103,513.02-155,269.53-82,638.78

Finding the Fourth Proportional to 103,513.02, 155,269.53 and 82,638.78

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Solution

The fourth proportional to 103,513.02, 155,269.53 and 82,638.78 is: 123,958.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,513.02 : 155,269.53 = 82,638.78 : x
  2. Step 2: Convert to fraction form
    103,513.02/155,269.53 = 82,638.78/x
  3. Step 3: Cross multiply
    103,513.02x = 155,269.53 × 82,638.78
  4. Step 4: Simplify right side
    103,513.02x = 12,831,284,530.37
  5. Step 5: Solve for x
    x = 12,831,284,530.37/103,513.02
  6. Step 6: Final answer
    x = 123,958.17

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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.