Home / 128,368.28-177,202.14-78,084.76

Finding the Fourth Proportional to 128,368.28, 177,202.14 and 78,084.76

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Solution

The fourth proportional to 128,368.28, 177,202.14 and 78,084.76 is: 107,789.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,368.28 : 177,202.14 = 78,084.76 : x
  2. Step 2: Convert to fraction form
    128,368.28/177,202.14 = 78,084.76/x
  3. Step 3: Cross multiply
    128,368.28x = 177,202.14 × 78,084.76
  4. Step 4: Simplify right side
    128,368.28x = 13,836,786,573.39
  5. Step 5: Solve for x
    x = 13,836,786,573.39/128,368.28
  6. Step 6: Final answer
    x = 107,789.76

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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.