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Finding the Fourth Proportional to 211,329.35, 316,960.29 and 78,179.32

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Solution

The fourth proportional to 211,329.35, 316,960.29 and 78,179.32 is: 117,256.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,329.35 : 316,960.29 = 78,179.32 : x
  2. Step 2: Convert to fraction form
    211,329.35/316,960.29 = 78,179.32/x
  3. Step 3: Cross multiply
    211,329.35x = 316,960.29 × 78,179.32
  4. Step 4: Simplify right side
    211,329.35x = 24,779,738,354.40
  5. Step 5: Solve for x
    x = 24,779,738,354.40/211,329.35
  6. Step 6: Final answer
    x = 117,256.49

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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.