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Finding the Fourth Proportional to 256,902.15, 385,390.08 and 79,423.02

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Solution

The fourth proportional to 256,902.15, 385,390.08 and 79,423.02 is: 119,145.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,902.15 : 385,390.08 = 79,423.02 : x
  2. Step 2: Convert to fraction form
    256,902.15/385,390.08 = 79,423.02/x
  3. Step 3: Cross multiply
    256,902.15x = 385,390.08 × 79,423.02
  4. Step 4: Simplify right side
    256,902.15x = 30,608,844,031.64
  5. Step 5: Solve for x
    x = 30,608,844,031.64/256,902.15
  6. Step 6: Final answer
    x = 119,145.92

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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.