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Finding the Fourth Proportional to 210,007.80, 315,011.70 and 119,958.08

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Solution

The fourth proportional to 210,007.80, 315,011.70 and 119,958.08 is: 179,937.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,007.80 : 315,011.70 = 119,958.08 : x
  2. Step 2: Convert to fraction form
    210,007.80/315,011.70 = 119,958.08/x
  3. Step 3: Cross multiply
    210,007.80x = 315,011.70 × 119,958.08
  4. Step 4: Simplify right side
    210,007.80x = 37,788,198,709.54
  5. Step 5: Solve for x
    x = 37,788,198,709.54/210,007.80
  6. Step 6: Final answer
    x = 179,937.12

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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.