Home / 128,614.51-177,488.04-72,025.88

Finding the Fourth Proportional to 128,614.51, 177,488.04 and 72,025.88

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Solution

The fourth proportional to 128,614.51, 177,488.04 and 72,025.88 is: 99,395.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,614.51 : 177,488.04 = 72,025.88 : x
  2. Step 2: Convert to fraction form
    128,614.51/177,488.04 = 72,025.88/x
  3. Step 3: Cross multiply
    128,614.51x = 177,488.04 × 72,025.88
  4. Step 4: Simplify right side
    128,614.51x = 12,783,732,542.97
  5. Step 5: Solve for x
    x = 12,783,732,542.97/128,614.51
  6. Step 6: Final answer
    x = 99,395.73

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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.