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Finding the Fourth Proportional to 118,212.21, 162,981.27 and 85,920.30

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Solution

The fourth proportional to 118,212.21, 162,981.27 and 85,920.30 is: 118,459.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,212.21 : 162,981.27 = 85,920.30 : x
  2. Step 2: Convert to fraction form
    118,212.21/162,981.27 = 85,920.30/x
  3. Step 3: Cross multiply
    118,212.21x = 162,981.27 × 85,920.30
  4. Step 4: Simplify right side
    118,212.21x = 14,003,399,612.78
  5. Step 5: Solve for x
    x = 14,003,399,612.78/118,212.21
  6. Step 6: Final answer
    x = 118,459.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.