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Finding the Fourth Proportional to 72,907.40, 109,361.10 and 36,043.40

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Solution

The fourth proportional to 72,907.40, 109,361.10 and 36,043.40 is: 54,065.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,907.40 : 109,361.10 = 36,043.40 : x
  2. Step 2: Convert to fraction form
    72,907.40/109,361.10 = 36,043.40/x
  3. Step 3: Cross multiply
    72,907.40x = 109,361.10 × 36,043.40
  4. Step 4: Simplify right side
    72,907.40x = 3,941,745,871.74
  5. Step 5: Solve for x
    x = 3,941,745,871.74/72,907.40
  6. Step 6: Final answer
    x = 54,065.10

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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.