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Finding the Fourth Proportional to 112,807.65, 155,745.34 and 72,591.31

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Solution

The fourth proportional to 112,807.65, 155,745.34 and 72,591.31 is: 100,221.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,807.65 : 155,745.34 = 72,591.31 : x
  2. Step 2: Convert to fraction form
    112,807.65/155,745.34 = 72,591.31/x
  3. Step 3: Cross multiply
    112,807.65x = 155,745.34 × 72,591.31
  4. Step 4: Simplify right side
    112,807.65x = 11,305,757,686.15
  5. Step 5: Solve for x
    x = 11,305,757,686.15/112,807.65
  6. Step 6: Final answer
    x = 100,221.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.