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Finding the Fourth Proportional to 70,905.72, 97,850.56 and 39,075.78

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Solution

The fourth proportional to 70,905.72, 97,850.56 and 39,075.78 is: 53,924.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,905.72 : 97,850.56 = 39,075.78 : x
  2. Step 2: Convert to fraction form
    70,905.72/97,850.56 = 39,075.78/x
  3. Step 3: Cross multiply
    70,905.72x = 97,850.56 × 39,075.78
  4. Step 4: Simplify right side
    70,905.72x = 3,823,586,955.44
  5. Step 5: Solve for x
    x = 3,823,586,955.44/70,905.72
  6. Step 6: Final answer
    x = 53,924.94

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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.