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Finding the Fourth Proportional to 243,487.20, 365,230.80 and 85,731.60

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Solution

The fourth proportional to 243,487.20, 365,230.80 and 85,731.60 is: 128,597.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,487.20 : 365,230.80 = 85,731.60 : x
  2. Step 2: Convert to fraction form
    243,487.20/365,230.80 = 85,731.60/x
  3. Step 3: Cross multiply
    243,487.20x = 365,230.80 × 85,731.60
  4. Step 4: Simplify right side
    243,487.20x = 31,311,820,853.28
  5. Step 5: Solve for x
    x = 31,311,820,853.28/243,487.20
  6. Step 6: Final answer
    x = 128,597.40

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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.