Home / 128,202.40-176,916.72-77,917.60

Finding the Fourth Proportional to 128,202.40, 176,916.72 and 77,917.60

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Solution

The fourth proportional to 128,202.40, 176,916.72 and 77,917.60 is: 107,524.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,202.40 : 176,916.72 = 77,917.60 : x
  2. Step 2: Convert to fraction form
    128,202.40/176,916.72 = 77,917.60/x
  3. Step 3: Cross multiply
    128,202.40x = 176,916.72 × 77,917.60
  4. Step 4: Simplify right side
    128,202.40x = 13,784,926,222.27
  5. Step 5: Solve for x
    x = 13,784,926,222.27/128,202.40
  6. Step 6: Final answer
    x = 107,524.71

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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.