Home / 128,591.10-177,450.62-72,001.26

Finding the Fourth Proportional to 128,591.10, 177,450.62 and 72,001.26

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Solution

The fourth proportional to 128,591.10, 177,450.62 and 72,001.26 is: 99,358.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,591.10 : 177,450.62 = 72,001.26 : x
  2. Step 2: Convert to fraction form
    128,591.10/177,450.62 = 72,001.26/x
  3. Step 3: Cross multiply
    128,591.10x = 177,450.62 × 72,001.26
  4. Step 4: Simplify right side
    128,591.10x = 12,776,667,867.77
  5. Step 5: Solve for x
    x = 12,776,667,867.77/128,591.10
  6. Step 6: Final answer
    x = 99,358.88

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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.