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Finding the Fourth Proportional to 235,635.71, 325,167.56 and 128,206.17

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Solution

The fourth proportional to 235,635.71, 325,167.56 and 128,206.17 is: 176,919.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,635.71 : 325,167.56 = 128,206.17 : x
  2. Step 2: Convert to fraction form
    235,635.71/325,167.56 = 128,206.17/x
  3. Step 3: Cross multiply
    235,635.71x = 325,167.56 × 128,206.17
  4. Step 4: Simplify right side
    235,635.71x = 41,688,486,834.81
  5. Step 5: Solve for x
    x = 41,688,486,834.81/235,635.71
  6. Step 6: Final answer
    x = 176,919.23

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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.