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Finding the Fourth Proportional to 257,137.04, 385,807.08 and 79,657.90

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Solution

The fourth proportional to 257,137.04, 385,807.08 and 79,657.90 is: 119,518.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,137.04 : 385,807.08 = 79,657.90 : x
  2. Step 2: Convert to fraction form
    257,137.04/385,807.08 = 79,657.90/x
  3. Step 3: Cross multiply
    257,137.04x = 385,807.08 × 79,657.90
  4. Step 4: Simplify right side
    257,137.04x = 30,732,581,797.93
  5. Step 5: Solve for x
    x = 30,732,581,797.93/257,137.04
  6. Step 6: Final answer
    x = 119,518.30

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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.