Home / 109,815.08-151,571.94-72,140.36

Finding the Fourth Proportional to 109,815.08, 151,571.94 and 72,140.36

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Solution

The fourth proportional to 109,815.08, 151,571.94 and 72,140.36 is: 99,571.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,815.08 : 151,571.94 = 72,140.36 : x
  2. Step 2: Convert to fraction form
    109,815.08/151,571.94 = 72,140.36/x
  3. Step 3: Cross multiply
    109,815.08x = 151,571.94 × 72,140.36
  4. Step 4: Simplify right side
    109,815.08x = 10,934,454,317.50
  5. Step 5: Solve for x
    x = 10,934,454,317.50/109,815.08
  6. Step 6: Final answer
    x = 99,571.52

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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.