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Finding the Fourth Proportional to 156,777.86, 216,354.63 and 85,157.87

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Solution

The fourth proportional to 156,777.86, 216,354.63 and 85,157.87 is: 117,518.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,777.86 : 216,354.63 = 85,157.87 : x
  2. Step 2: Convert to fraction form
    156,777.86/216,354.63 = 85,157.87/x
  3. Step 3: Cross multiply
    156,777.86x = 216,354.63 × 85,157.87
  4. Step 4: Simplify right side
    156,777.86x = 18,424,299,455.44
  5. Step 5: Solve for x
    x = 18,424,299,455.44/156,777.86
  6. Step 6: Final answer
    x = 117,518.50

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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.