Home / 118,721.61-178,082.06-91,743.21

Finding the Fourth Proportional to 118,721.61, 178,082.06 and 91,743.21

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Solution

The fourth proportional to 118,721.61, 178,082.06 and 91,743.21 is: 137,614.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,721.61 : 178,082.06 = 91,743.21 : x
  2. Step 2: Convert to fraction form
    118,721.61/178,082.06 = 91,743.21/x
  3. Step 3: Cross multiply
    118,721.61x = 178,082.06 × 91,743.21
  4. Step 4: Simplify right side
    118,721.61x = 16,337,819,369.10
  5. Step 5: Solve for x
    x = 16,337,819,369.10/118,721.61
  6. Step 6: Final answer
    x = 137,614.54

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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.