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Finding the Fourth Proportional to 156,783.82, 216,365.70 and 85,167.94

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Solution

The fourth proportional to 156,783.82, 216,365.70 and 85,167.94 is: 117,533.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,783.82 : 216,365.70 = 85,167.94 : x
  2. Step 2: Convert to fraction form
    156,783.82/216,365.70 = 85,167.94/x
  3. Step 3: Cross multiply
    156,783.82x = 216,365.70 × 85,167.94
  4. Step 4: Simplify right side
    156,783.82x = 18,427,420,955.66
  5. Step 5: Solve for x
    x = 18,427,420,955.66/156,783.82
  6. Step 6: Final answer
    x = 117,533.95

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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.