Home / 128,022.16-176,673-74,311.60

Finding the Fourth Proportional to 128,022.16, 176,673 and 74,311.60

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Solution

The fourth proportional to 128,022.16, 176,673 and 74,311.60 is: 102,551.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,022.16 : 176,673 = 74,311.60 : x
  2. Step 2: Convert to fraction form
    128,022.16/176,673 = 74,311.60/x
  3. Step 3: Cross multiply
    128,022.16x = 176,673 × 74,311.60
  4. Step 4: Simplify right side
    128,022.16x = 13,128,853,306.80
  5. Step 5: Solve for x
    x = 13,128,853,306.80/128,022.16
  6. Step 6: Final answer
    x = 102,551.41

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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.