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Finding the Fourth Proportional to 243,636.70, 365,455.05 and 85,881.10

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Solution

The fourth proportional to 243,636.70, 365,455.05 and 85,881.10 is: 128,821.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,636.70 : 365,455.05 = 85,881.10 : x
  2. Step 2: Convert to fraction form
    243,636.70/365,455.05 = 85,881.10/x
  3. Step 3: Cross multiply
    243,636.70x = 365,455.05 × 85,881.10
  4. Step 4: Simplify right side
    243,636.70x = 31,385,681,694.56
  5. Step 5: Solve for x
    x = 31,385,681,694.56/243,636.70
  6. Step 6: Final answer
    x = 128,821.65

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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.