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Finding the Fourth Proportional to 223,585.60, 308,591.94 and 128,156.20

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Solution

The fourth proportional to 223,585.60, 308,591.94 and 128,156.20 is: 176,880.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,585.60 : 308,591.94 = 128,156.20 : x
  2. Step 2: Convert to fraction form
    223,585.60/308,591.94 = 128,156.20/x
  3. Step 3: Cross multiply
    223,585.60x = 308,591.94 × 128,156.20
  4. Step 4: Simplify right side
    223,585.60x = 39,547,970,381.03
  5. Step 5: Solve for x
    x = 39,547,970,381.03/223,585.60
  6. Step 6: Final answer
    x = 176,880.67

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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.