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Finding the Fourth Proportional to 157,509.37, 217,359.03 and 85,890.79

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Solution

The fourth proportional to 157,509.37, 217,359.03 and 85,890.79 is: 118,527.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,509.37 : 217,359.03 = 85,890.79 : x
  2. Step 2: Convert to fraction form
    157,509.37/217,359.03 = 85,890.79/x
  3. Step 3: Cross multiply
    157,509.37x = 217,359.03 × 85,890.79
  4. Step 4: Simplify right side
    157,509.37x = 18,669,138,800.33
  5. Step 5: Solve for x
    x = 18,669,138,800.33/157,509.37
  6. Step 6: Final answer
    x = 118,527.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.