Home / 103,619.16-155,428.72-28,739.30

Finding the Fourth Proportional to 103,619.16, 155,428.72 and 28,739.30

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Solution

The fourth proportional to 103,619.16, 155,428.72 and 28,739.30 is: 43,108.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,619.16 : 155,428.72 = 28,739.30 : x
  2. Step 2: Convert to fraction form
    103,619.16/155,428.72 = 28,739.30/x
  3. Step 3: Cross multiply
    103,619.16x = 155,428.72 × 28,739.30
  4. Step 4: Simplify right side
    103,619.16x = 4,466,912,612.70
  5. Step 5: Solve for x
    x = 4,466,912,612.70/103,619.16
  6. Step 6: Final answer
    x = 43,108.94

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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.