Home / 131,938.31-198,172.17-78,734.07

Finding the Fourth Proportional to 131,938.31, 198,172.17 and 78,734.07

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Solution

The fourth proportional to 131,938.31, 198,172.17 and 78,734.07 is: 118,259.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,938.31 : 198,172.17 = 78,734.07 : x
  2. Step 2: Convert to fraction form
    131,938.31/198,172.17 = 78,734.07/x
  3. Step 3: Cross multiply
    131,938.31x = 198,172.17 × 78,734.07
  4. Step 4: Simplify right side
    131,938.31x = 15,602,901,504.83
  5. Step 5: Solve for x
    x = 15,602,901,504.83/131,938.31
  6. Step 6: Final answer
    x = 118,259.07

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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.