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Finding the Fourth Proportional to 51,383.78, 70,918.64 and 29,880.18

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Solution

The fourth proportional to 51,383.78, 70,918.64 and 29,880.18 is: 41,239.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,383.78 : 70,918.64 = 29,880.18 : x
  2. Step 2: Convert to fraction form
    51,383.78/70,918.64 = 29,880.18/x
  3. Step 3: Cross multiply
    51,383.78x = 70,918.64 × 29,880.18
  4. Step 4: Simplify right side
    51,383.78x = 2,119,061,728.56
  5. Step 5: Solve for x
    x = 2,119,061,728.56/51,383.78
  6. Step 6: Final answer
    x = 41,239.90

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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.