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Finding the Fourth Proportional to 156,783.60, 216,362.21 and 85,164.21

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Solution

The fourth proportional to 156,783.60, 216,362.21 and 85,164.21 is: 117,527.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,783.60 : 216,362.21 = 85,164.21 : x
  2. Step 2: Convert to fraction form
    156,783.60/216,362.21 = 85,164.21/x
  3. Step 3: Cross multiply
    156,783.60x = 216,362.21 × 85,164.21
  4. Step 4: Simplify right side
    156,783.60x = 18,426,316,688.50
  5. Step 5: Solve for x
    x = 18,426,316,688.50/156,783.60
  6. Step 6: Final answer
    x = 117,527.07

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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.