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Finding the Fourth Proportional to 187,245.80, 280,868.70 and 172,665.80

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Solution

The fourth proportional to 187,245.80, 280,868.70 and 172,665.80 is: 258,998.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    187,245.80 : 280,868.70 = 172,665.80 : x
  2. Step 2: Convert to fraction form
    187,245.80/280,868.70 = 172,665.80/x
  3. Step 3: Cross multiply
    187,245.80x = 280,868.70 × 172,665.80
  4. Step 4: Simplify right side
    187,245.80x = 48,496,418,780.46
  5. Step 5: Solve for x
    x = 48,496,418,780.46/187,245.80
  6. Step 6: Final answer
    x = 258,998.70

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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.