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Finding the Fourth Proportional to 258,115.98, 387,160.20 and 80,602.68

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Solution

The fourth proportional to 258,115.98, 387,160.20 and 80,602.68 is: 120,899.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,115.98 : 387,160.20 = 80,602.68 : x
  2. Step 2: Convert to fraction form
    258,115.98/387,160.20 = 80,602.68/x
  3. Step 3: Cross multiply
    258,115.98x = 387,160.20 × 80,602.68
  4. Step 4: Simplify right side
    258,115.98x = 31,206,149,709.34
  5. Step 5: Solve for x
    x = 31,206,149,709.34/258,115.98
  6. Step 6: Final answer
    x = 120,899.72

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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.