Home / 103,868.57-155,772.09-28,970.64

Finding the Fourth Proportional to 103,868.57, 155,772.09 and 28,970.64

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Solution

The fourth proportional to 103,868.57, 155,772.09 and 28,970.64 is: 43,447.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,868.57 : 155,772.09 = 28,970.64 : x
  2. Step 2: Convert to fraction form
    103,868.57/155,772.09 = 28,970.64/x
  3. Step 3: Cross multiply
    103,868.57x = 155,772.09 × 28,970.64
  4. Step 4: Simplify right side
    103,868.57x = 4,512,817,141.44
  5. Step 5: Solve for x
    x = 4,512,817,141.44/103,868.57
  6. Step 6: Final answer
    x = 43,447.38

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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.