Home / 103,689.08-155,512.35-28,790.40

Finding the Fourth Proportional to 103,689.08, 155,512.35 and 28,790.40

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Solution

The fourth proportional to 103,689.08, 155,512.35 and 28,790.40 is: 43,179.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,689.08 : 155,512.35 = 28,790.40 : x
  2. Step 2: Convert to fraction form
    103,689.08/155,512.35 = 28,790.40/x
  3. Step 3: Cross multiply
    103,689.08x = 155,512.35 × 28,790.40
  4. Step 4: Simplify right side
    103,689.08x = 4,477,262,761.44
  5. Step 5: Solve for x
    x = 4,477,262,761.44/103,689.08
  6. Step 6: Final answer
    x = 43,179.69

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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.