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Finding the Fourth Proportional to 131,361.50, 181,283.20 and 71,745.50

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Solution

The fourth proportional to 131,361.50, 181,283.20 and 71,745.50 is: 99,011.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,361.50 : 181,283.20 = 71,745.50 : x
  2. Step 2: Convert to fraction form
    131,361.50/181,283.20 = 71,745.50/x
  3. Step 3: Cross multiply
    131,361.50x = 181,283.20 × 71,745.50
  4. Step 4: Simplify right side
    131,361.50x = 13,006,253,825.60
  5. Step 5: Solve for x
    x = 13,006,253,825.60/131,361.50
  6. Step 6: Final answer
    x = 99,011.15

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1.5x scale

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.