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Finding the Fourth Proportional to 257,075.38, 385,631.43 and 79,559.56

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Solution

The fourth proportional to 257,075.38, 385,631.43 and 79,559.56 is: 119,345.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,075.38 : 385,631.43 = 79,559.56 : x
  2. Step 2: Convert to fraction form
    257,075.38/385,631.43 = 79,559.56/x
  3. Step 3: Cross multiply
    257,075.38x = 385,631.43 × 79,559.56
  4. Step 4: Simplify right side
    257,075.38x = 30,680,666,892.97
  5. Step 5: Solve for x
    x = 30,680,666,892.97/257,075.38
  6. Step 6: Final answer
    x = 119,345.02

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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.