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Finding the Fourth Proportional to 211,633.58, 317,446.88 and 85,270.74

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Solution

The fourth proportional to 211,633.58, 317,446.88 and 85,270.74 is: 127,904.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,633.58 : 317,446.88 = 85,270.74 : x
  2. Step 2: Convert to fraction form
    211,633.58/317,446.88 = 85,270.74/x
  3. Step 3: Cross multiply
    211,633.58x = 317,446.88 × 85,270.74
  4. Step 4: Simplify right side
    211,633.58x = 27,068,929,941.94
  5. Step 5: Solve for x
    x = 27,068,929,941.94/211,633.58
  6. Step 6: Final answer
    x = 127,904.70

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1.5x scale

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.