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Finding the Fourth Proportional to 210,005.80, 315,008.70 and 115,199.35

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Solution

The fourth proportional to 210,005.80, 315,008.70 and 115,199.35 is: 172,799.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,005.80 : 315,008.70 = 115,199.35 : x
  2. Step 2: Convert to fraction form
    210,005.80/315,008.70 = 115,199.35/x
  3. Step 3: Cross multiply
    210,005.80x = 315,008.70 × 115,199.35
  4. Step 4: Simplify right side
    210,005.80x = 36,288,797,484.35
  5. Step 5: Solve for x
    x = 36,288,797,484.35/210,005.80
  6. Step 6: Final answer
    x = 172,799.03

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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.