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Finding the Fourth Proportional to 512,063.88, 768,095.90 and 138,086.92

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Solution

The fourth proportional to 512,063.88, 768,095.90 and 138,086.92 is: 207,130.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,063.88 : 768,095.90 = 138,086.92 : x
  2. Step 2: Convert to fraction form
    512,063.88/768,095.90 = 138,086.92/x
  3. Step 3: Cross multiply
    512,063.88x = 768,095.90 × 138,086.92
  4. Step 4: Simplify right side
    512,063.88x = 106,063,997,095.63
  5. Step 5: Solve for x
    x = 106,063,997,095.63/512,063.88
  6. Step 6: Final answer
    x = 207,130.40

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1.5x scale

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.