Home / 128,675.04-177,570.96-72,086.88

Finding the Fourth Proportional to 128,675.04, 177,570.96 and 72,086.88

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Solution

The fourth proportional to 128,675.04, 177,570.96 and 72,086.88 is: 99,479.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,675.04 : 177,570.96 = 72,086.88 : x
  2. Step 2: Convert to fraction form
    128,675.04/177,570.96 = 72,086.88/x
  3. Step 3: Cross multiply
    128,675.04x = 177,570.96 × 72,086.88
  4. Step 4: Simplify right side
    128,675.04x = 12,800,536,485.00
  5. Step 5: Solve for x
    x = 12,800,536,485.00/128,675.04
  6. Step 6: Final answer
    x = 99,479.56

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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.