Home / 131,935.81-198,168.42-78,731.57

Finding the Fourth Proportional to 131,935.81, 198,168.42 and 78,731.57

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Solution

The fourth proportional to 131,935.81, 198,168.42 and 78,731.57 is: 118,255.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,935.81 : 198,168.42 = 78,731.57 : x
  2. Step 2: Convert to fraction form
    131,935.81/198,168.42 = 78,731.57/x
  3. Step 3: Cross multiply
    131,935.81x = 198,168.42 × 78,731.57
  4. Step 4: Simplify right side
    131,935.81x = 15,602,109,840.18
  5. Step 5: Solve for x
    x = 15,602,109,840.18/131,935.81
  6. Step 6: Final answer
    x = 118,255.31

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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.