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Finding the Fourth Proportional to 92,949.20, 139,423.80 and 30,611.60

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Solution

The fourth proportional to 92,949.20, 139,423.80 and 30,611.60 is: 45,917.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,949.20 : 139,423.80 = 30,611.60 : x
  2. Step 2: Convert to fraction form
    92,949.20/139,423.80 = 30,611.60/x
  3. Step 3: Cross multiply
    92,949.20x = 139,423.80 × 30,611.60
  4. Step 4: Simplify right side
    92,949.20x = 4,267,985,596.08
  5. Step 5: Solve for x
    x = 4,267,985,596.08/92,949.20
  6. Step 6: Final answer
    x = 45,917.40

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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.