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Finding the Fourth Proportional to 211,170.92, 316,700.82 and 78,089.27

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Solution

The fourth proportional to 211,170.92, 316,700.82 and 78,089.27 is: 117,113.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,170.92 : 316,700.82 = 78,089.27 : x
  2. Step 2: Convert to fraction form
    211,170.92/316,700.82 = 78,089.27/x
  3. Step 3: Cross multiply
    211,170.92x = 316,700.82 × 78,089.27
  4. Step 4: Simplify right side
    211,170.92x = 24,730,934,258.70
  5. Step 5: Solve for x
    x = 24,730,934,258.70/211,170.92
  6. Step 6: Final answer
    x = 117,113.35

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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.