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Finding the Fourth Proportional to 71,361.60, 106,912.80 and 58,142.40

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Solution

The fourth proportional to 71,361.60, 106,912.80 and 58,142.40 is: 87,108.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,361.60 : 106,912.80 = 58,142.40 : x
  2. Step 2: Convert to fraction form
    71,361.60/106,912.80 = 58,142.40/x
  3. Step 3: Cross multiply
    71,361.60x = 106,912.80 × 58,142.40
  4. Step 4: Simplify right side
    71,361.60x = 6,216,166,782.72
  5. Step 5: Solve for x
    x = 6,216,166,782.72/71,361.60
  6. Step 6: Final answer
    x = 87,108.01

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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.