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Finding the Fourth Proportional to 56,907.60, 85,361.40 and 53,991.60

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Solution

The fourth proportional to 56,907.60, 85,361.40 and 53,991.60 is: 80,987.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,907.60 : 85,361.40 = 53,991.60 : x
  2. Step 2: Convert to fraction form
    56,907.60/85,361.40 = 53,991.60/x
  3. Step 3: Cross multiply
    56,907.60x = 85,361.40 × 53,991.60
  4. Step 4: Simplify right side
    56,907.60x = 4,608,798,564.24
  5. Step 5: Solve for x
    x = 4,608,798,564.24/56,907.60
  6. Step 6: Final answer
    x = 80,987.40

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1.5x scale

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.