Home / 103,619.10-155,428.65-28,739.10

Finding the Fourth Proportional to 103,619.10, 155,428.65 and 28,739.10

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Solution

The fourth proportional to 103,619.10, 155,428.65 and 28,739.10 is: 43,108.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,619.10 : 155,428.65 = 28,739.10 : x
  2. Step 2: Convert to fraction form
    103,619.10/155,428.65 = 28,739.10/x
  3. Step 3: Cross multiply
    103,619.10x = 155,428.65 × 28,739.10
  4. Step 4: Simplify right side
    103,619.10x = 4,466,879,515.22
  5. Step 5: Solve for x
    x = 4,466,879,515.22/103,619.10
  6. Step 6: Final answer
    x = 43,108.65

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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.