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Finding the Fourth Proportional to 103,689.15, 155,533.73 and 51,201.15

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Solution

The fourth proportional to 103,689.15, 155,533.73 and 51,201.15 is: 76,801.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,689.15 : 155,533.73 = 51,201.15 : x
  2. Step 2: Convert to fraction form
    103,689.15/155,533.73 = 51,201.15/x
  3. Step 3: Cross multiply
    103,689.15x = 155,533.73 × 51,201.15
  4. Step 4: Simplify right side
    103,689.15x = 7,963,505,839.79
  5. Step 5: Solve for x
    x = 7,963,505,839.79/103,689.15
  6. Step 6: Final answer
    x = 76,801.73

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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.