Home / 128,525.20-177,365.28-71,936.50

Finding the Fourth Proportional to 128,525.20, 177,365.28 and 71,936.50

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Solution

The fourth proportional to 128,525.20, 177,365.28 and 71,936.50 is: 99,272.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,525.20 : 177,365.28 = 71,936.50 : x
  2. Step 2: Convert to fraction form
    128,525.20/177,365.28 = 71,936.50/x
  3. Step 3: Cross multiply
    128,525.20x = 177,365.28 × 71,936.50
  4. Step 4: Simplify right side
    128,525.20x = 12,759,037,464.72
  5. Step 5: Solve for x
    x = 12,759,037,464.72/128,525.20
  6. Step 6: Final answer
    x = 99,272.65

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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.