Home / 80,897.10-121,400.32-28,307.04

Finding the Fourth Proportional to 80,897.10, 121,400.32 and 28,307.04

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Solution

The fourth proportional to 80,897.10, 121,400.32 and 28,307.04 is: 42,479.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,897.10 : 121,400.32 = 28,307.04 : x
  2. Step 2: Convert to fraction form
    80,897.10/121,400.32 = 28,307.04/x
  3. Step 3: Cross multiply
    80,897.10x = 121,400.32 × 28,307.04
  4. Step 4: Simplify right side
    80,897.10x = 3,436,483,241.31
  5. Step 5: Solve for x
    x = 3,436,483,241.31/80,897.10
  6. Step 6: Final answer
    x = 42,479.69

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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.