Home / 103,428.30-155,142.45-36,870.60

Finding the Fourth Proportional to 103,428.30, 155,142.45 and 36,870.60

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Solution

The fourth proportional to 103,428.30, 155,142.45 and 36,870.60 is: 55,305.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,428.30 : 155,142.45 = 36,870.60 : x
  2. Step 2: Convert to fraction form
    103,428.30/155,142.45 = 36,870.60/x
  3. Step 3: Cross multiply
    103,428.30x = 155,142.45 × 36,870.60
  4. Step 4: Simplify right side
    103,428.30x = 5,720,195,216.97
  5. Step 5: Solve for x
    x = 5,720,195,216.97/103,428.30
  6. Step 6: Final answer
    x = 55,305.90

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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.