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Finding the Fourth Proportional to 156,479.88, 215,941.05 and 84,860.04

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Solution

The fourth proportional to 156,479.88, 215,941.05 and 84,860.04 is: 117,106.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,479.88 : 215,941.05 = 84,860.04 : x
  2. Step 2: Convert to fraction form
    156,479.88/215,941.05 = 84,860.04/x
  3. Step 3: Cross multiply
    156,479.88x = 215,941.05 × 84,860.04
  4. Step 4: Simplify right side
    156,479.88x = 18,324,766,140.64
  5. Step 5: Solve for x
    x = 18,324,766,140.64/156,479.88
  6. Step 6: Final answer
    x = 117,106.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.