Home / 128,012.28-176,628.66-74,266.16

Finding the Fourth Proportional to 128,012.28, 176,628.66 and 74,266.16

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Solution

The fourth proportional to 128,012.28, 176,628.66 and 74,266.16 is: 102,470.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,012.28 : 176,628.66 = 74,266.16 : x
  2. Step 2: Convert to fraction form
    128,012.28/176,628.66 = 74,266.16/x
  3. Step 3: Cross multiply
    128,012.28x = 176,628.66 × 74,266.16
  4. Step 4: Simplify right side
    128,012.28x = 13,117,532,324.15
  5. Step 5: Solve for x
    x = 13,117,532,324.15/128,012.28
  6. Step 6: Final answer
    x = 102,470.89

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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.