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Finding the Fourth Proportional to 210,318.72, 315,310.56 and 121,471.68

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Solution

The fourth proportional to 210,318.72, 315,310.56 and 121,471.68 is: 182,110.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,318.72 : 315,310.56 = 121,471.68 : x
  2. Step 2: Convert to fraction form
    210,318.72/315,310.56 = 121,471.68/x
  3. Step 3: Cross multiply
    210,318.72x = 315,310.56 × 121,471.68
  4. Step 4: Simplify right side
    210,318.72x = 38,301,303,444.94
  5. Step 5: Solve for x
    x = 38,301,303,444.94/210,318.72
  6. Step 6: Final answer
    x = 182,110.77

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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.