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Finding the Fourth Proportional to 211,649.60, 317,411.04 and 85,249.28

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Solution

The fourth proportional to 211,649.60, 317,411.04 and 85,249.28 is: 127,848.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,649.60 : 317,411.04 = 85,249.28 : x
  2. Step 2: Convert to fraction form
    211,649.60/317,411.04 = 85,249.28/x
  3. Step 3: Cross multiply
    211,649.60x = 317,411.04 × 85,249.28
  4. Step 4: Simplify right side
    211,649.60x = 27,059,062,624.05
  5. Step 5: Solve for x
    x = 27,059,062,624.05/211,649.60
  6. Step 6: Final answer
    x = 127,848.40

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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.