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Finding the Fourth Proportional to 55,970.10, 83,955.15 and 20,907.90

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Solution

The fourth proportional to 55,970.10, 83,955.15 and 20,907.90 is: 31,361.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,970.10 : 83,955.15 = 20,907.90 : x
  2. Step 2: Convert to fraction form
    55,970.10/83,955.15 = 20,907.90/x
  3. Step 3: Cross multiply
    55,970.10x = 83,955.15 × 20,907.90
  4. Step 4: Simplify right side
    55,970.10x = 1,755,325,880.69
  5. Step 5: Solve for x
    x = 1,755,325,880.69/55,970.10
  6. Step 6: Final answer
    x = 31,361.85

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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.