Home / 211,457.10-317,179.56-78,334.40

Finding the Fourth Proportional to 211,457.10, 317,179.56 and 78,334.40

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Solution

The fourth proportional to 211,457.10, 317,179.56 and 78,334.40 is: 117,499.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,457.10 : 317,179.56 = 78,334.40 : x
  2. Step 2: Convert to fraction form
    211,457.10/317,179.56 = 78,334.40/x
  3. Step 3: Cross multiply
    211,457.10x = 317,179.56 × 78,334.40
  4. Step 4: Simplify right side
    211,457.10x = 24,846,070,524.86
  5. Step 5: Solve for x
    x = 24,846,070,524.86/211,457.10
  6. Step 6: Final answer
    x = 117,499.34

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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.