Home / 112,807.47-155,745.09-72,591.12

Finding the Fourth Proportional to 112,807.47, 155,745.09 and 72,591.12

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Solution

The fourth proportional to 112,807.47, 155,745.09 and 72,591.12 is: 100,221.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,807.47 : 155,745.09 = 72,591.12 : x
  2. Step 2: Convert to fraction form
    112,807.47/155,745.09 = 72,591.12/x
  3. Step 3: Cross multiply
    112,807.47x = 155,745.09 × 72,591.12
  4. Step 4: Simplify right side
    112,807.47x = 11,305,710,517.60
  5. Step 5: Solve for x
    x = 11,305,710,517.60/112,807.47
  6. Step 6: Final answer
    x = 100,221.29

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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.