Home / 128,299.43-177,047.64-70,155.09

Finding the Fourth Proportional to 128,299.43, 177,047.64 and 70,155.09

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Solution

The fourth proportional to 128,299.43, 177,047.64 and 70,155.09 is: 96,810.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,299.43 : 177,047.64 = 70,155.09 : x
  2. Step 2: Convert to fraction form
    128,299.43/177,047.64 = 70,155.09/x
  3. Step 3: Cross multiply
    128,299.43x = 177,047.64 × 70,155.09
  4. Step 4: Simplify right side
    128,299.43x = 12,420,793,118.49
  5. Step 5: Solve for x
    x = 12,420,793,118.49/128,299.43
  6. Step 6: Final answer
    x = 96,810.97

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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.