Home / 280,910.16-421,407.27-103,403.70

Finding the Fourth Proportional to 280,910.16, 421,407.27 and 103,403.70

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Solution

The fourth proportional to 280,910.16, 421,407.27 and 103,403.70 is: 155,121.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,910.16 : 421,407.27 = 103,403.70 : x
  2. Step 2: Convert to fraction form
    280,910.16/421,407.27 = 103,403.70/x
  3. Step 3: Cross multiply
    280,910.16x = 421,407.27 × 103,403.70
  4. Step 4: Simplify right side
    280,910.16x = 43,575,070,924.90
  5. Step 5: Solve for x
    x = 43,575,070,924.90/280,910.16
  6. Step 6: Final answer
    x = 155,121.02

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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.