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Finding the Fourth Proportional to 180,946.80, 271,420.20 and 81,000.90

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Solution

The fourth proportional to 180,946.80, 271,420.20 and 81,000.90 is: 121,501.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,946.80 : 271,420.20 = 81,000.90 : x
  2. Step 2: Convert to fraction form
    180,946.80/271,420.20 = 81,000.90/x
  3. Step 3: Cross multiply
    180,946.80x = 271,420.20 × 81,000.90
  4. Step 4: Simplify right side
    180,946.80x = 21,985,280,478.18
  5. Step 5: Solve for x
    x = 21,985,280,478.18/180,946.80
  6. Step 6: Final answer
    x = 121,501.35

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Similar ratio
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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.