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Finding the Fourth Proportional to 185,624.60, 278,392.23 and 85,688.78

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Solution

The fourth proportional to 185,624.60, 278,392.23 and 85,688.78 is: 128,512.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,624.60 : 278,392.23 = 85,688.78 : x
  2. Step 2: Convert to fraction form
    185,624.60/278,392.23 = 85,688.78/x
  3. Step 3: Cross multiply
    185,624.60x = 278,392.23 × 85,688.78
  4. Step 4: Simplify right side
    185,624.60x = 23,855,089,158.22
  5. Step 5: Solve for x
    x = 23,855,089,158.22/185,624.60
  6. Step 6: Final answer
    x = 128,512.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.